code: def time_loop(self, threads, method):
      for i in range(threads):
          self.loop()
  
imports: from functools import wraps
  import threading
  import numpy
  from pandas import DataFrame, Index, Series, date_range, factorize, read_csv
  from pandas.core.algorithms import take_nd
  from .pandas_vb_common import BaseIO
  from .pandas_vb_common import setup
label_desc: Use image node_id 3 for calling the ParallelGroupbyMethods obj's underlying member method code with example usage: obj.time_loop(threads, method) without return types