diff --git a/Wrapper/XlsCellWrapper.php b/Wrapper/XlsCellWrapper.php
index e928580..ea2df22 100644
--- a/Wrapper/XlsCellWrapper.php
+++ b/Wrapper/XlsCellWrapper.php
@@ -49,58 +49,56 @@ public function __construct(array $context, XlsSheetWrapper $sheetWrapper)
 
     protected function initializeMappings()
     {
-        $wrapper = $this; // PHP 5.3 fix
-
-        $this->mappings['break'] = function ($value) use ($wrapper) {
-            $wrapper->sheetWrapper->getObject()->setBreak($wrapper->object->getCoordinate(), $value);
+        $this->mappings['break'] = function ($value) {
+            $this->sheetWrapper->getObject()->setBreak($this->object->getCoordinate(), $value);
         };
-        $this->mappings['dataType'] = function ($value) use ($wrapper) {
-            $wrapper->object->setDataType($value);
+        $this->mappings['dataType'] = function ($value) {
+            $this->object->setDataType($value);
         };
-        $this->mappings['dataValidation']['allowBlank'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setAllowBlank($value);
+        $this->mappings['dataValidation']['allowBlank'] = function ($value) {
+            $this->object->getDataValidation()->setAllowBlank($value);
         };
-        $this->mappings['dataValidation']['error'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setError($value);
+        $this->mappings['dataValidation']['error'] = function ($value) {
+            $this->object->getDataValidation()->setError($value);
         };
-        $this->mappings['dataValidation']['errorStyle'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setErrorStyle($value);
+        $this->mappings['dataValidation']['errorStyle'] = function ($value) {
+            $this->object->getDataValidation()->setErrorStyle($value);
         };
-        $this->mappings['dataValidation']['errorTitle'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setErrorTitle($value);
+        $this->mappings['dataValidation']['errorTitle'] = function ($value) {
+            $this->object->getDataValidation()->setErrorTitle($value);
         };
-        $this->mappings['dataValidation']['formula1'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setFormula1($value);
+        $this->mappings['dataValidation']['formula1'] = function ($value) {
+            $this->object->getDataValidation()->setFormula1($value);
         };
-        $this->mappings['dataValidation']['formula2'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setFormula2($value);
+        $this->mappings['dataValidation']['formula2'] = function ($value) {
+            $this->object->getDataValidation()->setFormula2($value);
         };
-        $this->mappings['dataValidation']['operator'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setOperator($value);
+        $this->mappings['dataValidation']['operator'] = function ($value) {
+            $this->object->getDataValidation()->setOperator($value);
         };
-        $this->mappings['dataValidation']['prompt'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setPrompt($value);
+        $this->mappings['dataValidation']['prompt'] = function ($value) {
+            $this->object->getDataValidation()->setPrompt($value);
         };
-        $this->mappings['dataValidation']['promptTitle'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setPromptTitle($value);
+        $this->mappings['dataValidation']['promptTitle'] = function ($value) {
+            $this->object->getDataValidation()->setPromptTitle($value);
         };
-        $this->mappings['dataValidation']['showDropDown'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setShowDropDown($value);
+        $this->mappings['dataValidation']['showDropDown'] = function ($value) {
+            $this->object->getDataValidation()->setShowDropDown($value);
         };
-        $this->mappings['dataValidation']['showErrorMessage'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setShowErrorMessage($value);
+        $this->mappings['dataValidation']['showErrorMessage'] = function ($value) {
+            $this->object->getDataValidation()->setShowErrorMessage($value);
         };
-        $this->mappings['dataValidation']['showInputMessage'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setShowInputMessage($value);
+        $this->mappings['dataValidation']['showInputMessage'] = function ($value) {
+            $this->object->getDataValidation()->setShowInputMessage($value);
         };
-        $this->mappings['dataValidation']['type'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDataValidation()->setType($value);
+        $this->mappings['dataValidation']['type'] = function ($value) {
+            $this->object->getDataValidation()->setType($value);
         };
-        $this->mappings['style'] = function ($value) use ($wrapper) {
-            $wrapper->sheetWrapper->getObject()->getStyle($wrapper->object->getCoordinate())->applyFromArray($value);
+        $this->mappings['style'] = function ($value) {
+            $this->sheetWrapper->getObject()->getStyle($this->object->getCoordinate())->applyFromArray($value);
         };
-        $this->mappings['url'] = function ($value) use ($wrapper) {
-            $wrapper->object->getHyperlink()->setUrl($value);
+        $this->mappings['url'] = function ($value) {
+            $this->object->getHyperlink()->setUrl($value);
         };
     }
 
diff --git a/Wrapper/XlsDocumentWrapper.php b/Wrapper/XlsDocumentWrapper.php
index 7790638..209a37b 100644
--- a/Wrapper/XlsDocumentWrapper.php
+++ b/Wrapper/XlsDocumentWrapper.php
@@ -48,61 +48,59 @@ public function __construct(array $context)
 
     protected function initializeMappings()
     {
-        $wrapper = $this; // PHP 5.3 fix
-
-        $this->mappings['category'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setCategory($value);
+        $this->mappings['category'] = function ($value) {
+            $this->object->getProperties()->setCategory($value);
         };
-        $this->mappings['company'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setCompany($value);
+        $this->mappings['company'] = function ($value) {
+            $this->object->getProperties()->setCompany($value);
         };
-        $this->mappings['created'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setCreated($value);
+        $this->mappings['created'] = function ($value) {
+            $this->object->getProperties()->setCreated($value);
         };
-        $this->mappings['creator'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setCreator($value);
+        $this->mappings['creator'] = function ($value) {
+            $this->object->getProperties()->setCreator($value);
         };
-        $this->mappings['defaultStyle'] = function ($value) use ($wrapper) {
-            $wrapper->object->getDefaultStyle()->applyFromArray($value);
+        $this->mappings['defaultStyle'] = function ($value) {
+            $this->object->getDefaultStyle()->applyFromArray($value);
         };
-        $this->mappings['description'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setDescription($value);
+        $this->mappings['description'] = function ($value) {
+            $this->object->getProperties()->setDescription($value);
         };
-        $this->mappings['format'] = function ($value) use ($wrapper) {
-            $wrapper->attributes['format'] = $value;
+        $this->mappings['format'] = function ($value) {
+            $this->attributes['format'] = $value;
         };
-        $this->mappings['keywords'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setKeywords($value);
+        $this->mappings['keywords'] = function ($value) {
+            $this->object->getProperties()->setKeywords($value);
         };
-        $this->mappings['lastModifiedBy'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setLastModifiedBy($value);
+        $this->mappings['lastModifiedBy'] = function ($value) {
+            $this->object->getProperties()->setLastModifiedBy($value);
         };
-        $this->mappings['manager'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setManager($value);
+        $this->mappings['manager'] = function ($value) {
+            $this->object->getProperties()->setManager($value);
         };
-        $this->mappings['modified'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setModified($value);
+        $this->mappings['modified'] = function ($value) {
+            $this->object->getProperties()->setModified($value);
         };
-        $this->mappings['security']['lockRevision'] = function ($value) use ($wrapper) {
-            $wrapper->object->getSecurity()->setLockRevision($value);
+        $this->mappings['security']['lockRevision'] = function ($value) {
+            $this->object->getSecurity()->setLockRevision($value);
         };
-        $this->mappings['security']['lockStructure'] = function ($value) use ($wrapper) {
-            $wrapper->object->getSecurity()->setLockStructure($value);
+        $this->mappings['security']['lockStructure'] = function ($value) {
+            $this->object->getSecurity()->setLockStructure($value);
         };
-        $this->mappings['security']['lockWindows'] = function ($value) use ($wrapper) {
-            $wrapper->object->getSecurity()->setLockWindows($value);
+        $this->mappings['security']['lockWindows'] = function ($value) {
+            $this->object->getSecurity()->setLockWindows($value);
         };
-        $this->mappings['security']['revisionsPassword'] = function ($value) use ($wrapper) {
-            $wrapper->object->getSecurity()->setRevisionsPassword($value);
+        $this->mappings['security']['revisionsPassword'] = function ($value) {
+            $this->object->getSecurity()->setRevisionsPassword($value);
         };
-        $this->mappings['security']['workbookPassword'] = function ($value) use ($wrapper) {
-            $wrapper->object->getSecurity()->setWorkbookPassword($value);
+        $this->mappings['security']['workbookPassword'] = function ($value) {
+            $this->object->getSecurity()->setWorkbookPassword($value);
         };
-        $this->mappings['subject'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setSubject($value);
+        $this->mappings['subject'] = function ($value) {
+            $this->object->getProperties()->setSubject($value);
         };
-        $this->mappings['title'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProperties()->setTitle($value);
+        $this->mappings['title'] = function ($value) {
+            $this->object->getProperties()->setTitle($value);
         };
     }
 
diff --git a/Wrapper/XlsDrawingWrapper.php b/Wrapper/XlsDrawingWrapper.php
index c728dd3..aba710b 100644
--- a/Wrapper/XlsDrawingWrapper.php
+++ b/Wrapper/XlsDrawingWrapper.php
@@ -55,62 +55,59 @@ public function __construct(array $context, XlsSheetWrapper $sheetWrapper, XlsHe
 
     protected function initializeMappings()
     {
-        $wrapper = $this; // PHP 5.3 fix
-
-        $this->mappings['coordinates'] = function ($value) use ($wrapper) {
-            $wrapper->object->setCoordinates($value);
+        $this->mappings['coordinates'] = function ($value) {
+            $this->object->setCoordinates($value);
         };
-        $this->mappings['description'] = function ($value) use ($wrapper) {
-            $wrapper->object->setDescription($value);
+        $this->mappings['description'] = function ($value) {
+            $this->object->setDescription($value);
         };
-        $this->mappings['height'] = function ($value) use ($wrapper) {
-            $wrapper->object->setHeight($value);
+        $this->mappings['height'] = function ($value) {
+            $this->object->setHeight($value);
         };
-        $this->mappings['name'] = function ($value) use ($wrapper) {
-            $wrapper->object->setName($value);
+        $this->mappings['name'] = function ($value) {
+            $this->object->setName($value);
         };
-        $this->mappings['offsetX'] = function ($value) use ($wrapper) {
-            $wrapper->object->setOffsetX($value);
+        $this->mappings['offsetX'] = function ($value) {
+            $this->object->setOffsetX($value);
         };
-        $this->mappings['offsetY'] = function ($value) use ($wrapper) {
-            $wrapper->object->setOffsetY($value);
+        $this->mappings['offsetY'] = function ($value) {
+            $this->object->setOffsetY($value);
         };
-        $this->mappings['resizeProportional'] = function ($value) use ($wrapper) {
-            $wrapper->object->setResizeProportional($value);
+        $this->mappings['resizeProportional'] = function ($value) {
+            $this->object->setResizeProportional($value);
         };
-        $this->mappings['rotation'] = function ($value) use ($wrapper) {
-            $wrapper->object->setRotation($value);
+        $this->mappings['rotation'] = function ($value) {
+            $this->object->setRotation($value);
         };
-        $this->mappings['shadow']['alignment'] = function ($value) use ($wrapper) {
-            $wrapper->object->getShadow()->setAlignment($value);
+        $this->mappings['shadow']['alignment'] = function ($value) {
+            $this->object->getShadow()->setAlignment($value);
         };
-        $this->mappings['shadow']['alpha'] = function ($value) use ($wrapper) {
-            $wrapper->object->getShadow()->setAlpha($value);
+        $this->mappings['shadow']['alpha'] = function ($value) {
+            $this->object->getShadow()->setAlpha($value);
         };
-        $this->mappings['shadow']['blurRadius'] = function ($value) use ($wrapper) {
-            $wrapper->object->getShadow()->setBlurRadius($value);
+        $this->mappings['shadow']['blurRadius'] = function ($value) {
+            $this->object->getShadow()->setBlurRadius($value);
         };
-        $this->mappings['shadow']['color'] = function ($value) use ($wrapper) {
-            $wrapper->object->getShadow()->getColor()->setRGB($value);
+        $this->mappings['shadow']['color'] = function ($value) {
+            $this->object->getShadow()->getColor()->setRGB($value);
         };
-        $this->mappings['shadow']['direction'] = function ($value) use ($wrapper) {
-            $wrapper->object->getShadow()->setDirection($value);
+        $this->mappings['shadow']['direction'] = function ($value) {
+            $this->object->getShadow()->setDirection($value);
         };
-        $this->mappings['shadow']['distance'] = function ($value) use ($wrapper) {
-            $wrapper->object->getShadow()->setDistance($value);
+        $this->mappings['shadow']['distance'] = function ($value) {
+            $this->object->getShadow()->setDistance($value);
         };
-        $this->mappings['shadow']['visible'] = function ($value) use ($wrapper) {
-            $wrapper->object->getShadow()->setVisible($value);
+        $this->mappings['shadow']['visible'] = function ($value) {
+            $this->object->getShadow()->setVisible($value);
         };
-        $this->mappings['width'] = function ($value) use ($wrapper) {
-            $wrapper->object->setWidth($value);
+        $this->mappings['width'] = function ($value) {
+            $this->object->setWidth($value);
         };
     }
 
     /**
-     * @param string $path
-     * @param array $properties
-     *
+     * @param $path
+     * @param array|null $properties
      * @throws \PHPExcel_Exception
      */
     public function start($path, array $properties = null)
diff --git a/Wrapper/XlsHeaderFooterWrapper.php b/Wrapper/XlsHeaderFooterWrapper.php
index 35642d9..75ce06c 100644
--- a/Wrapper/XlsHeaderFooterWrapper.php
+++ b/Wrapper/XlsHeaderFooterWrapper.php
@@ -56,13 +56,11 @@ public function __construct(array $context, XlsSheetWrapper $sheetWrapper)
 
     protected function initializeMappings()
     {
-        $wrapper = $this; // PHP 5.3 fix
-
-        $this->mappings['scaleWithDocument'] = function ($value) use ($wrapper) {
-            $wrapper->object->setScaleWithDocument($value);
+        $this->mappings['scaleWithDocument'] = function ($value) {
+            $this->object->setScaleWithDocument($value);
         };
-        $this->mappings['alignWithMargins'] = function ($value) use ($wrapper) {
-            $wrapper->object->setAlignWithMargins($value);
+        $this->mappings['alignWithMargins'] = function ($value) {
+            $this->object->setAlignWithMargins($value);
         };
     }
 
diff --git a/Wrapper/XlsSheetWrapper.php b/Wrapper/XlsSheetWrapper.php
index d22defd..3e1797b 100644
--- a/Wrapper/XlsSheetWrapper.php
+++ b/Wrapper/XlsSheetWrapper.php
@@ -70,177 +70,176 @@ public function __construct(array $context, XlsDocumentWrapper $documentWrapper)
 
     protected function initializeMappings()
     {
-        $wrapper = $this; // PHP 5.3 fix
-
         $this->mappings['columnDimension']['__multi'] = true;
-        $this->mappings['columnDimension']['__object'] = function ($key = 'default') use ($wrapper) {
-            return $key === 'default' ? $wrapper->object->getDefaultColumnDimension() : $wrapper->object->getColumnDimension($key);
+        $this->mappings['columnDimension']['__object'] = function ($key = 'default') {
+            return $key === 'default' ? $this->object->getDefaultColumnDimension() : $this->object->getColumnDimension($key);
         };
-        $this->mappings['columnDimension']['autoSize'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['columnDimension']['__object']($key)->setAutoSize($value);
+        $this->mappings['columnDimension']['autoSize'] = function ($key, $value) {
+            $this->mappings['columnDimension']['__object']($key)->setAutoSize($value);
         };
-        $this->mappings['columnDimension']['collapsed'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['columnDimension']['__object']($key)->setCollapsed($value);
+        $this->mappings['columnDimension']['collapsed'] = function ($key, $value) {
+            $this->mappings['columnDimension']['__object']($key)->setCollapsed($value);
         };
-        $this->mappings['columnDimension']['columnIndex'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['columnDimension']['__object']($key)->setColumnIndex($value);
+        $this->mappings['columnDimension']['columnIndex'] = function ($key, $value) {
+            $this->mappings['columnDimension']['__object']($key)->setColumnIndex($value);
         };
-        $this->mappings['columnDimension']['outlineLevel'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['columnDimension']['__object']($key)->setOutlineLevel($value);
+        $this->mappings['columnDimension']['outlineLevel'] = function ($key, $value) {
+            $this->mappings['columnDimension']['__object']($key)->setOutlineLevel($value);
         };
-        $this->mappings['columnDimension']['visible'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['columnDimension']['__object']($key)->setVisible($value);
+        $this->mappings['columnDimension']['visible'] = function ($key, $value) {
+            $this->mappings['columnDimension']['__object']($key)->setVisible($value);
         };
-        $this->mappings['columnDimension']['width'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['columnDimension']['__object']($key)->setWidth($value);
+        $this->mappings['columnDimension']['width'] = function ($key, $value) {
+            $this->mappings['columnDimension']['__object']($key)->setWidth($value);
         };
-        $this->mappings['columnDimension']['xfIndex'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['columnDimension']['__object']($key)->setXfIndex($value);
+        $this->mappings['columnDimension']['xfIndex'] = function ($key, $value) {
+            $this->mappings['columnDimension']['__object']($key)->setXfIndex($value);
         };
-        $this->mappings['pageMargins']['top'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageMargins()->setTop($value);
+        $this->mappings['pageMargins']['top'] = function ($value) {
+            $this->object->getPageMargins()->setTop($value);
         };
-        $this->mappings['pageMargins']['bottom'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageMargins()->setBottom($value);
+        $this->mappings['pageMargins']['bottom'] = function ($value) {
+            $this->object->getPageMargins()->setBottom($value);
         };
-        $this->mappings['pageMargins']['left'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageMargins()->setLeft($value);
+        $this->mappings['pageMargins']['left'] = function ($value) {
+            $this->object->getPageMargins()->setLeft($value);
         };
-        $this->mappings['pageMargins']['right'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageMargins()->setRight($value);
+        $this->mappings['pageMargins']['right'] = function ($value) {
+            $this->object->getPageMargins()->setRight($value);
         };
-        $this->mappings['pageMargins']['header'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageMargins()->setHeader($value);
+        $this->mappings['pageMargins']['header'] = function ($value) {
+            $this->object->getPageMargins()->setHeader($value);
         };
-        $this->mappings['pageMargins']['footer'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageMargins()->setFooter($value);
+        $this->mappings['pageMargins']['footer'] = function ($value) {
+            $this->object->getPageMargins()->setFooter($value);
         };
-        $this->mappings['pageSetup']['fitToHeight'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setFitToHeight($value);
+        $this->mappings['pageSetup']['fitToHeight'] = function ($value) {
+            $this->object->getPageSetup()->setFitToHeight($value);
         };
-        $this->mappings['pageSetup']['fitToPage'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setFitToPage($value);
+        $this->mappings['pageSetup']['fitToPage'] = function ($value) {
+            $this->object->getPageSetup()->setFitToPage($value);
         };
-        $this->mappings['pageSetup']['fitToWidth'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setFitToWidth($value);
+        $this->mappings['pageSetup']['fitToWidth'] = function ($value) {
+            $this->object->getPageSetup()->setFitToWidth($value);
         };
-        $this->mappings['pageSetup']['horizontalCentered'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setHorizontalCentered($value);
+        $this->mappings['pageSetup']['horizontalCentered'] = function ($value) {
+            $this->object->getPageSetup()->setHorizontalCentered($value);
         };
-        $this->mappings['pageSetup']['orientation'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setOrientation($value);
+        $this->mappings['pageSetup']['orientation'] = function ($value) {
+            $this->object->getPageSetup()->setOrientation($value);
         };
-        $this->mappings['pageSetup']['paperSize'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setPaperSize($value);
+        $this->mappings['pageSetup']['paperSize'] = function ($value) {
+            $this->object->getPageSetup()->setPaperSize($value);
         };
-        $this->mappings['pageSetup']['printArea'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setPrintArea($value);
+        $this->mappings['pageSetup']['printArea'] = function ($value) {
+            $this->object->getPageSetup()->setPrintArea($value);
         };
-        $this->mappings['pageSetup']['scale'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setScale($value);
+        $this->mappings['pageSetup']['scale'] = function ($value) {
+            $this->object->getPageSetup()->setScale($value);
         };
-        $this->mappings['pageSetup']['verticalCentered'] = function ($value) use ($wrapper) {
-            $wrapper->object->getPageSetup()->setVerticalCentered($value);
+        $this->mappings['pageSetup']['verticalCentered'] = function ($value) {
+            $this->object->getPageSetup()->setVerticalCentered($value);
         };
-        $this->mappings['printGridlines'] = function ($value) use ($wrapper) {
-            $wrapper->object->setPrintGridlines($value);
+        $this->mappings['printGridlines'] = function ($value) {
+            $this->object->setPrintGridlines($value);
         };
-        $this->mappings['protection']['autoFilter'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setAutoFilter($value);
+        $this->mappings['protection']['autoFilter'] = function ($value) {
+            $this->object->getProtection()->setAutoFilter($value);
         };
-        $this->mappings['protection']['deleteColumns'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setDeleteColumns($value);
+        $this->mappings['protection']['deleteColumns'] = function ($value) {
+            $this->object->getProtection()->setDeleteColumns($value);
         };
-        $this->mappings['protection']['deleteRows'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setDeleteRows($value);
+        $this->mappings['protection']['deleteRows'] = function ($value) {
+            $this->object->getProtection()->setDeleteRows($value);
         };
-        $this->mappings['protection']['formatCells'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setFormatCells($value);
+        $this->mappings['protection']['formatCells'] = function ($value) {
+            $this->object->getProtection()->setFormatCells($value);
         };
-        $this->mappings['protection']['formatColumns'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setFormatColumns($value);
+        $this->mappings['protection']['formatColumns'] = function ($value) {
+            $this->object->getProtection()->setFormatColumns($value);
         };
-        $this->mappings['protection']['formatRows'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setFormatRows($value);
+        $this->mappings['protection']['formatRows'] = function ($value) {
+            $this->object->getProtection()->setFormatRows($value);
         };
-        $this->mappings['protection']['insertColumns'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setInsertColumns($value);
+        $this->mappings['protection']['insertColumns'] = function ($value) {
+            $this->object->getProtection()->setInsertColumns($value);
         };
-        $this->mappings['protection']['insertHyperlinks'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setInsertHyperlinks($value);
+        $this->mappings['protection']['insertHyperlinks'] = function ($value) {
+            $this->object->getProtection()->setInsertHyperlinks($value);
         };
-        $this->mappings['protection']['insertRows'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setInsertRows($value);
+        $this->mappings['protection']['insertRows'] = function ($value) {
+            $this->object->getProtection()->setInsertRows($value);
         };
-        $this->mappings['protection']['objects'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setObjects($value);
+        $this->mappings['protection']['objects'] = function ($value) {
+            $this->object->getProtection()->setObjects($value);
         };
-        $this->mappings['protection']['password'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setPassword($value);
+        $this->mappings['protection']['password'] = function ($value) {
+            $this->object->getProtection()->setPassword($value);
         };
-        $this->mappings['protection']['pivotTables'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setPivotTables($value);
+        $this->mappings['protection']['pivotTables'] = function ($value) {
+            $this->object->getProtection()->setPivotTables($value);
         };
-        $this->mappings['protection']['scenarios'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setScenarios($value);
+        $this->mappings['protection']['scenarios'] = function ($value) {
+            $this->object->getProtection()->setScenarios($value);
         };
-        $this->mappings['protection']['selectLockedCells'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setSelectLockedCells($value);
+        $this->mappings['protection']['selectLockedCells'] = function ($value) {
+            $this->object->getProtection()->setSelectLockedCells($value);
         };
-        $this->mappings['protection']['selectUnlockedCells'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setSelectUnlockedCells($value);
+        $this->mappings['protection']['selectUnlockedCells'] = function ($value) {
+            $this->object->getProtection()->setSelectUnlockedCells($value);
         };
-        $this->mappings['protection']['sheet'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setSheet($value);
+        $this->mappings['protection']['sheet'] = function ($value) {
+            $this->object->getProtection()->setSheet($value);
         };
-        $this->mappings['protection']['sort'] = function ($value) use ($wrapper) {
-            $wrapper->object->getProtection()->setSort($value);
+        $this->mappings['protection']['sort'] = function ($value) {
+            $this->object->getProtection()->setSort($value);
         };
-        $this->mappings['rightToLeft'] = function ($value) use ($wrapper) {
-            $wrapper->object->setRightToLeft($value);
+        $this->mappings['rightToLeft'] = function ($value) {
+            $this->object->setRightToLeft($value);
         };
         $this->mappings['rowDimension']['__multi'] = true;
-        $this->mappings['rowDimension']['__object'] = function ($key) use ($wrapper) {
-            return $key === 'default' ? $wrapper->object->getDefaultRowDimension() : $wrapper->object->getRowDimension($key);
+        $this->mappings['rowDimension']['__object'] = function ($key) {
+            return $key === 'default' ? $this->object->getDefaultRowDimension() : $this->object->getRowDimension($key);
         };
-        $this->mappings['rowDimension']['collapsed'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['rowDimension']['__object']($key)->setCollapsed($value);
+        $this->mappings['rowDimension']['collapsed'] = function ($key, $value) {
+            $this->mappings['rowDimension']['__object']($key)->setCollapsed($value);
         };
-        $this->mappings['rowDimension']['outlineLevel'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['rowDimension']['__object']($key)->setOutlineLevel($value);
+        $this->mappings['rowDimension']['outlineLevel'] = function ($key, $value) {
+            $this->mappings['rowDimension']['__object']($key)->setOutlineLevel($value);
         };
-        $this->mappings['rowDimension']['rowHeight'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['rowDimension']['__object']($key)->setRowHeight($value);
+        $this->mappings['rowDimension']['rowHeight'] = function ($key, $value) {
+            $this->mappings['rowDimension']['__object']($key)->setRowHeight($value);
         };
-        $this->mappings['rowDimension']['rowIndex'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['rowDimension']['__object']($key)->setRowIndex($value);
+        $this->mappings['rowDimension']['rowIndex'] = function ($key, $value) {
+            $this->mappings['rowDimension']['__object']($key)->setRowIndex($value);
         };
-        $this->mappings['rowDimension']['visible'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['rowDimension']['__object']($key)->setVisible($value);
+        $this->mappings['rowDimension']['visible'] = function ($key, $value) {
+            $this->mappings['rowDimension']['__object']($key)->setVisible($value);
         };
-        $this->mappings['rowDimension']['xfIndex'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['rowDimension']['__object']($key)->setXfIndex($value);
+        $this->mappings['rowDimension']['xfIndex'] = function ($key, $value) {
+            $this->mappings['rowDimension']['__object']($key)->setXfIndex($value);
         };
-        $this->mappings['rowDimension']['zeroHeight'] = function ($key, $value) use ($wrapper) {
-            $wrapper->mappings['rowDimension']['__object']($key)->setZeroHeight($value);
+        $this->mappings['rowDimension']['zeroHeight'] = function ($key, $value) {
+            $this->mappings['rowDimension']['__object']($key)->setZeroHeight($value);
         };
-        $this->mappings['sheetState'] = function ($value) use ($wrapper) {
-            $wrapper->object->setSheetState($value);
+        $this->mappings['sheetState'] = function ($value) {
+            $this->object->setSheetState($value);
         };
-        $this->mappings['showGridlines'] = function ($value) use ($wrapper) {
-            $wrapper->object->setShowGridlines($value);
+        $this->mappings['showGridlines'] = function ($value) {
+            $this->object->setShowGridlines($value);
         };
-        $this->mappings['tabColor'] = function ($value) use ($wrapper) {
-            $wrapper->object->getTabColor()->setRGB($value);
+        $this->mappings['tabColor'] = function ($value) {
+            $this->object->getTabColor()->setRGB($value);
         };
-        $this->mappings['zoomScale'] = function ($value) use ($wrapper) {
-            $wrapper->object->getSheetView()->setZoomScale($value);
+        $this->mappings['zoomScale'] = function ($value) {
+            $this->object->getSheetView()->setZoomScale($value);
         };
     }
 
     /**
      * @param $index
-     * @param array $properties
+     * @param array|null $properties
+     * @throws \PHPExcel_Exception
      */
     public function start($index, array $properties = null)
     {