public function add($key, $message)
    {
        if ($this->isUnique($key, $message)) {
            $this->messages[$key][] = $message;
        }

        return $this;
    }
public function add($key, $message)
    {
        if ($this->isUnique($key, $message)) {
            $this->messages[$key][] = $message;
        }

        return $this;
    }
public function add ( $ key , $ message ) { if ( $ this -> isUnique ( $ key , $ message ) ) { $ this -> messages [ $ key ] [ ] = $ message ; } return $ this ; }
Add a message to the message bag.

@param  string  $key
@param  string  $message
@return $this
Add a message to the message bag .