class_docstr: Fake for CompetitionDatastoreClient.
class_docstr_tok: ["Fake","for","CompetitionDatastoreClient","."]
docstr: Starts batch of mutations.
docstr_tok: ["Starts","batch","of","mutations","."]
code: def batch(self):
      """Starts batch of mutations."""
      raise NotImplementedError(
          "FakeDatastoreClient.batch not implemented"
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import copy
  from io import StringIO
  import six
label_desc: Use image node_id 9 for calling the FakeDatastoreClient obj's underlying member method code with example usage: obj.batch() without return types