code: def __tensor_unflatten__(
      inner_tensors, meta, outer_size, outer_stride
  ):
      assert meta is None
      a, b = inner_tensors["a"], inner_tensors["b"]
      return TwoTensor(a, b)
  
file_path: pytorch/torch/testing/_internal/two_tensor.py
imports: import torch
  import torch.utils._pytree
  from torch.utils._python_dispatch import return_and_correct_aliasing
label_desc: Use image node_id 5 for calling the TwoTensor obj's underlying member method code with example usage: obj.__tensor_unflatten__(inner_tensors, meta, outer_size, outer_stride) and returns: TwoTensor