code: def test_concatenations_and_stacking(self) -> None:
      for n_arrays in [1, 2, 5]:
          shapes: List[List[int]] = [
              [],
              [1],
              [1, 1],
              [2, 3, 5, 7],
              [1] * 6,
          ]
          for shape in shapes:
              arrays1 = [
                  torch.arange(
                      i, i + np.prod(shape, dtype=int)
                  ).reshape(shape)
                  for i in range(n_arrays)
              ]
              result0 = torch.stack(arrays1)
              result1 = rearrange(arrays1, "...->...")
              torch.testing.assert_close(result0, result1)
  
file_path: pytorch/test/functorch/test_rearrange.py
imports: from typing import List, Tuple
  import numpy
  import torch
  from functorch.einops import rearrange
  from torch.testing._internal.common_utils import TestCase, run_tests
label_desc: Use image node_id 5 for calling the TestRearrange obj's underlying member method code with example usage: obj.test_concatenations_and_stacking() without return types