public static RuntimeException peel(final Throwable t) {
        return (RuntimeException) peel(t, null, null, HAZELCAST_EXCEPTION_WRAPPER);
    }
@Test
    public void testPeel_whenThrowableIsRuntimeException_thenReturnOriginal() {
        RuntimeException result = ExceptionUtil.peel(throwable);

        assertEquals(throwable, result);
    }