code: def populate_space(self, trial_id):
      return {
          "values": {"hp1": "populate_space"},
          "status": trial_module.TrialStatus.RUNNING,
      }
  
imports: import datetime
  import threading
  import time
  import numpy
  import pytest
  import keras_tuner
  from keras_tuner.engine import oracle
  from keras_tuner.engine import trial
  from keras_tuner.tuners import gridsearch
label_desc: Use image node_id 2 for calling the OracleStub obj's underlying member method code with example usage: obj.populate_space(trial_id) and returns: dict