ParticipantId participantId = ParticipantId.from("participantId");
UserConfig userConfig = new UserConfig(Scope.participant(participantId));
userConfig.setSimpleField(KEY1, VALUE1);
InstanceConfig instanceConfig = new InstanceConfig(participantId);
instanceConfig.setHostName("localhost");
instanceConfig.addNamespacedConfig(userConfig);
instanceConfig.getRecord().setSimpleField(KEY2, VALUE2);
// should have key1 and key2, not hostname
UserConfig result = instanceConfig.getUserConfig();
Assert.assertEquals(result.getSimpleField(KEY1), VALUE1);