/**
  * singleton pattern
  *
  * @return Text2Image
  */
 public static function getInstance()
 {
     if (!isset(self::$instance) || !self::$instance instanceof Text2Image) {
         self::$instance = new Text2Image();
     }
     return self::$instance;
 }
 /**
  * Create multiple versions of the image and then passes these versions directly to ->execute()
  * 
  * @param number $numberOfImages
  */
 public function pushTestImage2API($numberOfImages = 2)
 {
     if (strlen($this->imageUrl) && $this->itemId > 0) {
         for ($i = 1; $i <= $numberOfImages; $i++) {
             $base64 = Text2Image::getInstance()->setImageUrl($this->imageUrl)->pushText2Image('#' . $i, 20, 110, 96)->getFileBase64();
             $fileEnding = Text2Image::getInstance()->getFileEnding();
             if (strlen($base64)) {
                 $oPlentySoapObject_FileBase64Encoded = new PlentySoapObject_FileBase64Encoded();
                 $oPlentySoapObject_FileBase64Encoded->FileData = $base64;
                 $oPlentySoapObject_FileBase64Encoded->FileEnding = $fileEnding;
                 $oPlentySoapObject_FileBase64Encoded->FileName = 'plentymarkets_testimage_' . $this->itemId . '_' . $i;
                 $oPlentySoapObject_ItemImage = new PlentySoapObject_ItemImage();
                 $oPlentySoapObject_ItemImage->ImageData = $oPlentySoapObject_FileBase64Encoded;
                 $oPlentySoapObject_ItemImage->Availability = 1;
                 $oPlentySoapObject_ItemImage->Position = $i - 1;
                 $this->oPlentySoapRequest_AddItemsImage = new PlentySoapRequest_AddItemsImage();
                 $this->oPlentySoapRequest_AddItemsImage->Image = $oPlentySoapObject_ItemImage;
                 $this->oPlentySoapRequest_AddItemsImage->ItemID = $this->itemId;
                 $this->execute();
             } else {
                 $this->getLogger()->crit(__FUNCTION__ . ' I did not get base64 data.');
             }
         }
     } else {
         $this->getLogger()->crit(__FUNCTION__ . ' I miss some data - itemId:' . $this->itemId . ' imageUrl:' . $this->imageUrl);
     }
 }