Fix sip binding test failures for private classes

src/core/layertree/qgslayertreemodel.cpp

@@ -32,6 +32,7 @@
 #include "qgssymbollayerv2utils.h"
 #include "qgsvectorlayer.h"
 
+///@cond PRIVATE
 
 /** In order to support embedded widgets in layer tree view, the model
  * generates one placeholder legend node for each embedded widget.
@@ -52,7 +53,7 @@ class EmbeddedWidgetLegendNode : public QgsLayerTreeModelLegendNode
     }
 };
 
-
+///@endcond
 
 QgsLayerTreeModel::QgsLayerTreeModel( QgsLayerTreeGroup* rootNode, QObject *parent )
     : QAbstractItemModel( parent )

src/gui/layertree/qgslayertreeembeddedwidgetsimpl.h

@@ -24,6 +24,7 @@ class QSlider;
 class QTimer;
 class QgsMapLayer;
 
+///@cond PRIVATE
 /**
  * @brief Implementation of simple transparency widget to be used in layer tree view
  *
@@ -56,5 +57,5 @@ class QgsLayerTreeTransparencyWidget : public QWidget
     QSlider* mSlider;
     QTimer* mTimer;
 };
-
+///@endcond
 #endif // QGSLAYERTREEEMBEDDEDWIDGETSIMPL_H