/**
  * update single folders counter
  * 
  * @param  mixed  $_folderId
  * @param  array  $_counters
  * @return Felamimail_Model_Folder
  */
 public function updateFolderCounter($_folderId, array $_counters)
 {
     if (Tinebase_Core::isLogLevel(Zend_Log::DEBUG)) {
         Tinebase_Core::getLogger()->debug(__METHOD__ . '::' . __LINE__ . " starting update of folder counter with id {$_folderId}");
     }
     return $this->_backend->updateFolderCounter($_folderId, $_counters);
 }
 /**
  * update single folders counter
  * 
  * @param  mixed  $_folderId
  * @param  array  $_counters
  * @return Felamimail_Model_Folder
  */
 public function updateFolderCounter($_folderId, array $_counters)
 {
     return $this->_backend->updateFolderCounter($_folderId, $_counters);
 }