public FEELFnResult<String> invoke(@ParameterName("from") Object val) {
        if ( val == null ) {
            return FEELFnResult.ofResult( null );
        } else {
            return FEELFnResult.ofResult( TypeUtil.formatValue(val, false) );
        }
    }
@Test
    void invokeMaskedFormat() {
        FunctionTestUtil.assertResult(stringFunction.invoke("%s is here!", new Object[]{"Gorgonzola"}), "Gorgonzola " +
                "is here!");
    }