protected function addProduct($name, $description, $color = null, $size = null, $altKey = null, $seller = null, $parent = null)
 {
     if (($product = $this->isProductExist($name)) === false) {
         $product = new Entity\Product();
     }
     $product->setName($name);
     $product->setDescription($description);
     $product->setCustomer($this->_customer);
     $product->setCustomText1($color);
     $product->setCustomText2($size);
     $product->setCustomText3($altKey);
     $product->setCustomText4($seller);
     $product->setParent($parent);
     $this->_em->persist($product);
     return $product;
 }