public FEELFnResult<Object> invoke(@ParameterName("input") String input, @ParameterName("pattern") String pattern,
                                       @ParameterName( "replacement" ) String replacement ) {
        return invoke(input, pattern, replacement, null);
    }
@Test
    void invokeWithFlagDotAll() {
        FunctionTestUtil.assertResult(replaceFunction.invoke("fo\nbar", "o.b", "ttt", "s"), "ftttar");
    }