code: def unflatten(coalesced, bucket):
      if not imported_flatten_impl:
          import_flatten_impl()
      return unflatten_impl(coalesced, bucket)
  
imports: from collections import OrderedDict
  import copy
  import importlib
  from itertools import chain
  import torch
  import torch.distributed
  from torch.nn.modules import Module
  from torch.autograd import Variable
  from ..multi_tensor_apply import multi_tensor_applier
label_desc: Use image node_id 3 for calling a global function with example usage: unflatten(coalesced, bucket) and returns: unflatten_impl