ScenarioSimulationHasBusyIndicatorDefaultErrorCallback extends HasBusyIndicatorDefaultErrorCallback { public void hideBusyIndicator() { CustomBusyPopup.close(); super.hideBusyIndicator(); } ScenarioSimulationHasBusyIndicatorDefaultErrorCallback(HasBusyIndicator view); @Override boolean error(final Message message,
                         final Throwable throwable); void hideBusyIndicator();  }
@Test public void hideBusyIndicator() { scenarioSimulationHasBusyIndicatorDefaultErrorCallback.hideBusyIndicator(); verify(scenarioSimulationViewMock, times(1)).hideBusyIndicator(); }