public Environment set(@NonNull String key, @NonNull Object value) {
        props.remove(key);
        props.put(key, value.toString());
        return this;
    }
@Test
    public void testSet() {
        Environment environment = Environment.empty();
        environment.set("name", "biezhi");

        assertEquals("biezhi", environment.getOrNull("name"));

        environment.add("age", 20);
        assertEquals(Integer.valueOf(20), environment.getIntOrNull("age"));
    }