/**
  * @param \Closure|Monolog\Logger $logger
  * @return void
  */
 public function setLogger($logger)
 {
     if ($logger instanceof Monolog\Logger) {
         $this->logger = function ($message, $level) use($logger) {
             switch ($level) {
                 case 'info':
                     $logger->info($message);
                     return;
                 case 'warn':
                 default:
                     $logger->warn($message);
                     return;
             }
         };
     } else {
         $this->logger = $logger;
     }
 }