/**
  * Write memcache/apc debug info to the log
  */
 private function debug($type, $key, $data = null, $result = null)
 {
     $line = strtoupper($type) . ' ' . $key;
     if ($data !== null) {
         $line .= ' ' . ($this->packed ? $data : serialize($data));
     }
     rcube::debug($this->type, $line, $result);
 }
 /**
  * Write memcache debug info to the log
  */
 protected function debug($type, $key, $data = null, $result = null)
 {
     $line = strtoupper($type) . ' ' . $key;
     if ($data !== null) {
         $line .= ' ' . $data;
     }
     rcube::debug($this->type, $line, $result);
 }