diff --git a/generator/src/Parameter.php b/generator/src/Parameter.php
index 248b8653..71d03a85 100644
--- a/generator/src/Parameter.php
+++ b/generator/src/Parameter.php
@@ -15,17 +15,13 @@ class Parameter
      * @var PhpStanType
      */
     private $type;
-    /**
-     * @var PhpStanParameter|null
-     */
-    private $phpStanParams;
 
     public function __construct(\SimpleXMLElement $parameter, ?PhpStanFunction $phpStanFunction)
     {
         $this->parameter = $parameter;
-        $this->phpStanParams = $phpStanFunction ? $phpStanFunction->getParameter($this->getParameter()) : null;
+        $phpStanParam = $phpStanFunction ? $phpStanFunction->getParameter($this->getParameter()) : null;
         
-        $this->type = $this->phpStanParams ? $this->phpStanParams->getType() : new PhpStanType($this->parameter->type->__toString());
+        $this->type = $phpStanParam ? $phpStanParam->getType() : new PhpStanType($this->parameter->type->__toString());
     }
 
     /**
diff --git a/generator/src/PhpStanFunctions/PhpStanParameter.php b/generator/src/PhpStanFunctions/PhpStanParameter.php
index d14fd02e..333ca2cd 100644
--- a/generator/src/PhpStanFunctions/PhpStanParameter.php
+++ b/generator/src/PhpStanFunctions/PhpStanParameter.php
@@ -15,19 +15,6 @@ class PhpStanParameter
      * @var PhpStanType
      */
     private $type;
-
-    /**
-     * @var bool
-     */
-    private $optional = false;
-    /**
-     * @var bool
-     */
-    private $variadic = false;
-    /**
-     * @var bool
-     */
-    private $byReference = false;
     /**
      * Whether the parameter is "write only" (applies only to "by reference" parameters)
      * @var bool
@@ -37,15 +24,6 @@ class PhpStanParameter
     public function __construct(string $name, string $type)
     {
         $writeOnly = false;
-        if (\strpos($name, '=') !== false) {
-            $this->optional = true;
-        }
-        if (\strpos($name, '...') !== false) {
-            $this->variadic = true;
-        }
-        if (\strpos($name, '&') !== false) {
-            $this->byReference = true;
-        }
         if (\strpos($name, '&w_') !== false) {
             $writeOnly = true;
         }
@@ -68,42 +46,4 @@ public function getType(): PhpStanType
     {
         return $this->type;
     }
-
-    /**
-     * @return bool
-     */
-    public function isOptional(): bool
-    {
-        return $this->optional;
-    }
-
-    /**
-     * @return bool
-     */
-    public function isVariadic(): bool
-    {
-        return $this->variadic;
-    }
-
-    /**
-     * @return bool
-     */
-    public function isByReference(): bool
-    {
-        return $this->byReference;
-    }
-
-    /**
-     * Whether the parameter is "write only" (applies only to "by reference" parameters)
-     * @return bool
-     */
-    public function isWriteOnly(): bool
-    {
-        return $this->writeOnly;
-    }
-
-    public function isNullable(): bool
-    {
-        return $this->type->isNullable();
-    }
 }
diff --git a/generator/src/PhpStanFunctions/PhpStanType.php b/generator/src/PhpStanFunctions/PhpStanType.php
index 634c5697..8ec87343 100644
--- a/generator/src/PhpStanFunctions/PhpStanType.php
+++ b/generator/src/PhpStanFunctions/PhpStanType.php
@@ -32,6 +32,7 @@ class PhpStanType
 
     public function __construct(string $data, bool $writeOnly = false)
     {
+        //first we try to parse the type string to have a list as clean as possible.
         $nullable = false;
         $falsable = false;
         // Let's make the parameter nullable if it is by reference and is used only for writing.
@@ -89,6 +90,7 @@ public function getDocBlockType(?int $errorType = null): string
 
     public function getSignatureType(?int $errorType = null): string
     {
+        //We edit the return type depending of the "onErrorType" of the function. For example, a function that is both nullable and "nullsy" will created a non nullable safe function. Only relevant on return type.
         $nullable = $errorType === Method::NULLSY_TYPE ? false : $this->nullable;
         $falsable = $errorType === Method::FALSY_TYPE ? false : $this->falsable;
         $types = $this->types;
@@ -107,7 +109,7 @@ public function getSignatureType(?int $errorType = null): string
             }
         }
         
-        //if there are several types, no typehint
+        //if there are several distinct types, no typehint (we use distinct in case doc block contains several times the same type, for example array<int>|array<string>)
         if (count(array_unique($types)) > 1) {
             return '';
         } elseif (\in_array('void', $types) || (count($types) === 0 && !$nullable && !$falsable)) {
@@ -133,14 +135,4 @@ public function isFalsable(): bool
     {
         return $this->falsable;
     }
-
-    public function removeFalsable(): void
-    {
-        $this->falsable = false;
-    }
-
-    public function removeNullable(): void
-    {
-        $this->nullable = false;
-    }
 }
diff --git a/generator/tests/PhpStanFunctions/PhpStanFunctionMapReaderTest.php b/generator/tests/PhpStanFunctions/PhpStanFunctionMapReaderTest.php
index 7507322a..600b5402 100644
--- a/generator/tests/PhpStanFunctions/PhpStanFunctionMapReaderTest.php
+++ b/generator/tests/PhpStanFunctions/PhpStanFunctionMapReaderTest.php
@@ -25,9 +25,6 @@ public function testGet(): void
         $this->assertCount(2, $parameters);
         $this->assertSame('success', $parameters['success']->getName());
         $this->assertSame('bool|null', $parameters['success']->getType()->getDocBlockType());
-        $this->assertFalse($parameters['success']->isVariadic());
-        $this->assertTrue($parameters['success']->isByReference());
-        $this->assertTrue($parameters['success']->isOptional());
     }
     
     //todo: find a way to test custom map