/**
  * 
  * @param string $tag - menu namespace, like "top_nave"
  * @param int $x    -  x-coordinate of item
  * @param int $y    -  y-coordinate of item
  * @param array|MenuContainer $arrMenuFields  
  */
 public function AddToCollection($tag, $x, $y, $arrMenuFields)
 {
     $oMenu = $this->GetFromCollection($tag, $x, $y);
     $bNewMenuIsObj = $arrMenuFields instanceof \Av\Component\Menu\MenuContainer;
     $bOldMenuIsObj = $oMenu instanceof \Av\Component\Menu\MenuContainer;
     if ($bOldMenuIsObj == false) {
         /*
          * replace at the position
          */
         $this->_menu_collection[$tag][$x][$y] = $bNewMenuIsObj ? $arrMenuFields : new MenuContainer($arrMenuFields);
     } else {
         /*
          * change resource/dinamic only
          */
         $oMenu->SetMenuRes($bNewMenuIsObj ? $arrMenuFields->GetMenuRes() : $arrMenuFields);
         $oMenu->SetMenuDynamic($bNewMenuIsObj ? $arrMenuFields->GetMenuDynamic() : $arrMenuFields);
     }
 }