/**
  * Return whether it is possible to send the given command using the given transport
  *
  * @param   IcingaCommand               $command
  * @param   CommandTransportInterface   $transport
  *
  * @return  bool
  */
 protected function transferPossible($command, $transport)
 {
     if (!method_exists($transport, 'getInstance') || !$command instanceof ObjectCommand) {
         return true;
     }
     $transportInstance = $transport->getInstance();
     if (!$transportInstance || $transportInstance === 'none') {
         return true;
     }
     return strtolower($transportInstance) === strtolower($command->getObject()->instance_name);
 }