def METHOD_NAME():
    builder = ConfigurationBuilder()
    builder.add("key1", 1)
    builder.add("key2", "two")
    builder.add("key3", None)
    builder.add("key4", False, False, "description")
    builder.add("key5", 1.2, True, "description")
    assert {"key1", "key2", "key3", "key4", "key5"} == set(builder.list_config_keys())