code: def synchronize_between_processes(self):
      for iou_type in self.iou_types:
          self.eval_imgs[iou_type] = np.concatenate(
              self.eval_imgs[iou_type], 2
          )
          create_common_coco_eval(
              self.coco_eval[iou_type],
              self.img_ids,
              self.eval_imgs[iou_type],
          )
  
imports: import json
  from collections import defaultdict
  import numpy
  import copy
  import torch
  import torch._six
  from pycocotools.cocoeval import COCOeval
  from pycocotools.coco import COCO
  import pycocotools.mask
  from train_utils.distributed_utils import all_gather
label_desc: Use image node_id 3 for calling the CocoEvaluator obj's underlying member method code with example usage: obj.synchronize_between_processes() without return types