code: def _get_complexity_regularization_summary_key():
      return "complexity_regularization/adanet/adanet_weighted_ensemble"
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import contextlib
  from absl.testing import parameterized
  from adanet import ensemble
  from adanet import subnetwork
  from adanet import tf_compat
  from adanet.core.summary import Summary
  import mock
  import tensorflow.compat.v2
  from tensorflow.python.eager import context
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 3 for calling a global function with example usage: _get_complexity_regularization_summary_key() and returns: str