/**
  * Liefert
  *
  * @param 	string 	$cmd
  * @return 	tx_xajax_response
  */
 public function sendXajaxResponse($cmd)
 {
     t3lib_div::_GETset($cmd, 'PM');
     //@TODO: ist $this->PA immer gleich? mehrere treeviews beachten
     tx_rnbase::load('tx_mklib_treelib_TreeView');
     $oTreeView = tx_mklib_treelib_TreeView::makeInstance($this->PA, $this->oTceForm);
     tx_rnbase::load('tx_mklib_treelib_Renderer');
     $oRenderer = tx_mklib_treelib_Renderer::makeInstance($this->PA, $this->oTceForm);
     $sContent = $oRenderer->getBrowsableTree($oTreeView);
     // ajax response erstellen
     /* @var $objResponse tx_xajax_response */
     $objResponse = tx_rnbase::makeInstance('tx_xajax_response');
     $objResponse->addAssign($oTreeView->treeName . '-tree-div', 'innerHTML', $sContent);
     return $objResponse;
 }