public void addProperty(String key, String value) {
        store.put(key, value);
    }
@Test
    void testGetInt() {
        memConfig.addProperty("a", "1");
        Assertions.assertEquals(1, memConfig.getInt("a"));
        Assertions.assertEquals(Integer.valueOf(1), memConfig.getInteger("a", 2));
        Assertions.assertEquals(2, memConfig.getInt("b", 2));
    }