code: def _update_dict(initial_dict, update):
      """Updates dictionary with update content
  
      Args:
          initial_dict: initial dictionary
          update: updated dictionary
      """
      for key, value_list in update.items():
          if key in initial_dict:
              initial_dict[key].update(value_list)
          else:
              initial_dict[key] = set(value_list)
  
imports: from collections import defaultdict
  from copy import deepcopy
  import numpy
  import fiftyone.core.plots
  import fiftyone.utils.iou
  from .detection import DetectionEvaluation, DetectionEvaluationConfig, DetectionResults
label_desc: Use image node_id 10 for calling a global function with example usage: _update_dict(initial_dict, update) without return types