### Question:
SetActiveModuleRequest { public static SetActiveModuleRequest activeteModule(String id) { requireNotBlank(id, "Module id cannot be null"); return new SetActiveModuleRequest(id); } private  SetActiveModuleRequest(String id); Optional<String> getActiveModuleId(); static SetActiveModuleRequest activeteModule(String id); static SetActiveModuleRequest activeteCurrentModule();  }### Answer:
@Test(expected = IllegalArgumentException.class) public void blank() { SetActiveModuleRequest.activeteModule(" "); }