### Question:
DefaultWorkbenchErrorCallback { public static boolean isInvalidBusContentException(final Throwable throwable) { return throwable instanceof InvalidBusContentException; }  static boolean isKieServerForbiddenException(final Throwable throwable); static boolean isKieServerUnauthorizedException(final Throwable throwable); static boolean isInvalidBusContentException(final Throwable throwable); static boolean isServerOfflineException(final Throwable throwable); void error(final Throwable throwable); void queue(final Throwable throwable); void dequeue(); void processQueue();  }### Answer:
@Test public void testInvalidBusContentException() { assertTrue(isInvalidBusContentException(new InvalidBusContentException("text/html", "content"))); assertFalse(isInvalidBusContentException(new RuntimeException())); }