/**
  * 
  * @param \webignition\CssValidatorOutput\Message\Message $message
  */
 public function addMessage(Message $message)
 {
     $this->messages[] = $message;
     if ($message->isError()) {
         $this->errorCount++;
     }
     if ($message->isWarning()) {
         $this->warningCount++;
     }
 }