@Override
    public ConfigData get(String path) {
        return get(path, null);
    }
@Test
    void testGetMultipleKeysAndCompare() {
        ConfigData properties = envVarConfigProvider.get("");
        assertNotEquals(0, properties.data().size());
        assertEquals("value1", properties.data().get("test_var1"));
        assertEquals("value2", properties.data().get("secret_var2"));
        assertEquals("value3", properties.data().get("new_var3"));
        assertEquals("value4", properties.data().get("not_so_secret_var4"));
    }