public static void setExceptionPredicate(Predicate<Throwable> exceptionPredicate) {
        AssertUtil.notNull(exceptionPredicate, "exception predicate must not be null");
        Tracer.exceptionPredicate = exceptionPredicate;
    }
@Test(expected = IllegalArgumentException.class)
    public void testNull3() {
        Tracer.setExceptionPredicate(null);
    }