def chown(self, path, owner, group, recursive=False):
        raise NotImplementedError("Webhdfs in luigi doesn't implement chown")
The subproject tarball includes files like so:
dataset/ETHPy150Open spotify/luigi/luigi/contrib/hdfs/webhdfs_client.py/WebHdfsClient.chown--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/python/test/test_release.py/DistributionBuilderTest.test_subProjectLayout