public String getMqttServer() {
    return mqttServer;
  }
@Test
  public void testSaveDefaultEmptyConnection() {
    MQTTConsumerMeta roundTrippedMeta = fromXml( meta.getXML() );
    assertThat( roundTrippedMeta, equalTo( meta ) );
    assertTrue( roundTrippedMeta.getMqttServer().isEmpty() );
  }