code: def get_timestamp_us():
      return int(time.time() * 1e6)
  
imports: import os
  import threading
  import time
  from enum import Enum
  from typing import List
  import torch
  from colossalai.gemini.ophooks import BaseOpHook
  from colossalai.gemini.stateful_tensor import StatefulTensor
  from colossalai.legacy.engine import Engine
  from colossalai.legacy.utils.profiler.extention import ProfilerExtension
label_desc: Use image node_id 1 for calling a global function with example usage: get_timestamp_us() and returns: int