/**
  * Handle log* functions
  *
  * @param  string $name
  * @param  array $args
  * @return mixed
  */
 public function __call($name, $args)
 {
     if (substr($name, 0, 3) === 'log') {
         try {
             $message = vsprintf(@$args[0], @array_slice($args, 1));
         } catch (Exception $e) {
             return parent::__call($name, $args);
         }
         switch (substr($name, 3)) {
             case 'Error':
                 return $this->_log(Zend_Log::ERR, $message);
             case 'Warn':
                 return $this->_log(Zend_Log::WARN, $message);
             case 'Notice':
                 return $this->_log(Zend_Log::NOTICE, $message);
             case 'Info':
                 return $this->_log(Zend_Log::INFO, $message);
             case 'Debug':
                 if (Mage::helper('turpentine/varnish')->getVarnishDebugEnabled()) {
                     return $this->_log(Zend_Log::DEBUG, $message);
                 } else {
                     return;
                 }
             default:
                 break;
         }
     }
     // return parent::__call( $name, $args );
     return null;
 }