StateVars {
  A_ARG_TYPE_ServiceDescriptorList
  A_ARG_TYPE_ServiceTypeList
  ServiceId
  ServiceListVersion
  SessionId
  Username
}

Actions {
  GetSessionId(ServiceId: ui4, Username: String) -> (SessionId: String)
  ListAvailableServices() -> (AvailableServiceDescriptorList: String, AvailableServiceTypeList: String, AvailableServiceListVersion: String)
  UpdateAvailableServices()
}