code: function createMessage(type, transaction) {
    const msg = new StunMessage();
  
    msg.setType(type);
    msg.setTransactionID(transaction || createTransaction());
  
    return msg;
  }
docs: Creates a new STUN message.
  @param {number} type - Message type (see constants).
  @param {Buffer} [transaction] - Message `transaction` field, random by default.
  @returns {StunMessage} StunMessage instance.