code: def _fake_set_num_towers(generator_name, number_of_towers, output):
      output.update({generator_name: number_of_towers})
      return None
  
imports: import functools
  import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import mock
  from model_search import hparam
  from model_search.architecture import architecture_utils
  from model_search.generators import trial_utils
  from model_search.proto import distillation_spec_pb2
  from model_search.proto import ensembling_spec_pb2
  from model_search.proto import phoenix_spec_pb2
  import tensorflow.compat.v2
  from google.protobuf import text_format
label_desc: Use image node_id 2 for calling a global function with example usage: _fake_set_num_towers(generator_name, number_of_towers, output) and returns: None