docstr: Set a time mark with current time, and this time mark will push into a stack.
  :return: float
      A timestamp for current time.
docstr_tok: ["Set","a","time","mark","with","current","time",",","and","this","time","mark","will","push","into","a","stack",".",":","return",":","float","A","timestamp","for","current","time","."]
code: def set_time_mark(cls):
      """
      Set a time mark with current time, and this time mark will push into a stack.
      :return: float
          A timestamp for current time.
      """
      _time = time()
      cls.time_marks.append(_time)
      return _time
  
imports: import logging
  from typing import Optional, Text, Dict, Any
  import re
  from logging import config
  from time import time
  from contextlib import contextmanager
  from .config import C
label_desc: Use image node_id 1 for calling the TimeInspector obj's underlying member method code with example usage: obj.set_time_mark(cls) and returns: _time