@Property(surroundWithTag = false)
  @XMap(keyAttributeName = "id", entryTagName = "system")
  public Map<String, State> getExternalSystemsState() {
    return myExternalSystemsState;
  }
@Property(surroundWithTag = false)
  @XMap(keyAttributeName = "id", entryTagName = "system")
  public Map<String, State> getExternalSystemsState()