code: def recall_overall(summary_df, overall_dic):
      del summary_df
      recall = quiet_divide(
          overall_dic["num_detections"], overall_dic["num_objects"]
      )
      return recall
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import copy
  import sys
  import math
  from collections import defaultdict
  import numpy
  import pandas
  from .metrics import Metric
  from ppdet.utils.logger import setup_logger
label_desc: Use image node_id 4 for calling the MCMOTMetricOverall obj's underlying member method code with example usage: obj.recall_overall(summary_df, overall_dic) and returns: recall