def METHOD_NAME():
    tags1 = Tags({'a': 'b'})
    conlifcting_tags = Tags({'a': 'c'})
    assert (tags1 + tags1)._tags == tags1._tags # pylint: disable=protected-access
    with pytest.raises(TaggingConflict):
        tags1 + conlifcting_tags # pylint: disable=pointless-statement