/**
  * Write text in current image, define details via callback
  *
  * @param string $text
  * @param integer $posx
  * @param integer $posy
  * @param \Closure $callback
  * @return \Intervention\Image\Image 
  * @static 
  */
 public static function textCallback($text, $posx = 0, $posy = 0, $callback = null)
 {
     return \Intervention\Image\Image::textCallback($text, $posx, $posy, $callback);
 }