class_docstr: A worker manager which spawns a new thread for each worker. 
docstr: Returns the last time we received a job. 
docstr_tok: ["Returns","the","last","time","we","received","a","job","."]
code: def _get_last_receive_time(self):
      """Returns the last time we received a job."""
      all_receive_times = list(self.last_receive_times.values())
      return max(all_receive_times)
  
imports: from __future__ import print_function
  from __future__ import division
  from argparse import Namespace
  from multiprocessing import Process
  import numpy
  import os
  import pickle
  import shutil
  import time
  from .exd_utils import EVAL_ERROR_CODE
label_desc: Use image node_id 10 for calling the MultiProcessingWorkerManager obj's underlying member method code with example usage: obj._get_last_receive_time() and returns: max