code: def get_time(self):
      # return the recorded duration.
      return self.e1.elapsed_time(self.e2)
  
imports: from statistics import mean
  import time
  from unittest.mock import patch
  import pytest
  import torch
  from torch.cuda import Event
  import torch.multiprocessing
  import torch.nn
  from fairscale.fair_dev.testing.testing import dist_init, get_cycles_per_ms, skip_if_single_gpu, teardown, temp_files_ctx
  from fairscale.internal import torch_version
  from fairscale.nn import enable_wrap, wrap
  from fairscale.nn.data_parallel import FullyShardedDataParallel
label_desc: Use image node_id 3 for calling the Layer obj's underlying member method code with example usage: obj.get_time() and returns: self