class_docstr: Very small wrapper to update the run_config before a trial.
class_docstr_tok: ["Very","small","wrapper","to","update","the","run_config","before","a","trial","."]
code: def _populate_initial_space(self):
      return None
  
imports: import contextlib
  import copy
  import json
  import os
  import random
  from absl import flags
  from absl import logging
  import keras_tuner
  from model_search import hparam
  from model_search import phoenix
  from model_search import registry
  from model_search.data import data
  from model_search.metadata import ml_metadata_db
  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 the ModelSearchTuner obj's underlying member method code with example usage: obj._populate_initial_space() and returns: None