@classmethod
  def _default_filters(cls):
    return ()
Compute indexer and mask for new index given the current index. The
dataset/ETHPy150Open GoogleCloudPlatform/datastore-ndb-python/ndb/model.py/Model._default_filters--crossover with--dataset/ETHPy150Open pydata/pandas/pandas/indexes/base.py/Index.get_indexer