// Test with special numeric values
        OptionalEntity<Double> nanOpt = OptionalUtil.ofNullable(Double.NaN);
        assertTrue(nanOpt.isPresent());
        assertTrue(Double.isNaN(nanOpt.get()));

        OptionalEntity<Double> infinityOpt = OptionalUtil.ofNullable(Double.POSITIVE_INFINITY);
        assertTrue(infinityOpt.isPresent());
        assertTrue(Double.isInfinite(infinityOpt.get()));