>>> from torchao.prototype.mx_formats.nvfp4_tensor import NVFP4Tensor
>>> import torch
>>> torch.ops.aten._to_copy(NVFP4Tensor.to_nvfp4(torch.randn((32, 128))), dtype=torch.bfloat16)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/andrewor/local/pytorch/torch/_ops.py", line 1254, in __call__
    return self._op(*args, **kwargs)
  File "/home/andrewor/local/ao/torchao/prototype/mx_formats/nvfp4_tensor.py", line 137, in __torch_dispatch__
    return NVFP4_OPS_TABLE[func](func, types, args, kwargs)
  File "/home/andrewor/local/ao/torchao/prototype/mx_formats/nvfp4_tensor.py", line 316, in nvfp4_to_copy
    tensor._data,
AttributeError: 'NVFP4Tensor' object has no attribute '_data'