public function msgType($msgType)
    {
        if (!in_array($msgType, $this->msgTypes, true)) {
            throw new InvalidArgumentException('This message type not exist.');
        }

        $this->msgType = $msgType;

        return $this;
    }
public function msgType($msgType)
    {
        if (!in_array($msgType, $this->msgTypes, true)) {
            throw new InvalidArgumentException('This message type not exist.');
        }

        $this->msgType = $msgType;

        return $this;
    }
public function msgType ( $ msgType ) { if ( ! in_array ( $ msgType , $ this -> msgTypes , true ) ) { throw new InvalidArgumentException ( 'This message type not exist.' ) ; } $ this -> msgType = $ msgType ; return $ this ; }
Set message type.

@param string $msgType

@return MessageBuilder

@throws InvalidArgumentException
Set message type .