@property
  def format(self):
    return 'text'
Remove duplicate index from block_device_mapping table.
dataset/ETHPy150Open GoogleCloudPlatform/DataflowPythonSDK/google/cloud/dataflow/io/fileio.py/TextFileSink.format--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/db/sqlalchemy/migrate_repo/versions/249_remove_duplicate_index.py/upgrade