code: def mocked_datetime(monkeypatch):
      """Make ``datetime.datetime.utcnow()`` return an arbitrary date."""
      with monkeypatch.context() as m:
          m.setattr(datetime, "datetime", MockDatetime)
  
          yield MockDatetime
  
imports: import contextlib
  import copy
  import datetime
  import os
  from contextlib import contextmanager
  from falcon import testing
  import orion.algo.space
  import orion.core.io.experiment_builder
  from orion.core.io.space_builder import SpaceBuilder
  from orion.core.worker.producer import Producer
  from orion.serving.webapi import WebApi
  from orion.testing.state import OrionState
label_desc: Use image node_id 8 for calling a global function with example usage: mocked_datetime(monkeypatch) without return types