torch.nn.functional.fold
torch.nn.functional.fold(input, output_size, kernel_size, dilation=1, padding=0, stride=1)
Combines an array of sliding local blocks into a large containing
   tensor.
Warning:
 Currently, only unbatched (3D) or batched (4D) image-like output
 tensors are supported.

See "torch.nn.Fold" for details
Return type:
      Tensor