def METHOD_NAME():
    with pytest.raises(TypeError) as excinfo:
        ind = "indicator--00000000-0000-4000-8000-000000000001"
        CompositeDataSource().add_data_sources(ind)
    assert "DataSource (to be added) is not of type stix2.DataSource. DataSource type is '{}'".format(type(ind)) == str(excinfo.value)