code: def reduce_from_all_processes(self):
      self.mat = reduce_across_processes(self.mat).to(torch.int64)
  
imports: import datetime
  import errno
  import os
  import time
  from collections import defaultdict, deque
  import torch
  import torch.distributed
label_desc: Use image node_id 5 for calling the ConfusionMatrix obj's underlying member method code with example usage: obj.reduce_from_all_processes() without return types