code: def test_validate_success(timetable: Timetable) -> None:
      timetable.validate()
  
imports: from __future__ import annotations
  import datetime
  import dateutil.relativedelta
  import pendulum
  import pytest
  import time_machine
  from airflow.exceptions import AirflowTimetableInvalid
  from airflow.timetables.base import DagRunInfo, DataInterval, TimeRestriction, Timetable
  from airflow.timetables.interval import CronDataIntervalTimetable, DeltaDataIntervalTimetable
  from airflow.utils.timezone import utc
label_desc: Use image node_id 5 for calling a global function with example usage: test_validate_success(timetable) without return types