Torch.tensor.mps()

Why doesn’t tensor.mps() work?
E.g.

In [22]: import torch

In [23]: print(torch.__version__)
1.13.0a0+gitb637810

In [24]: x = torch.tensor([1., 2.]).cpu()

In [25]: x
Out[25]: tensor([1., 2.])

In [26]: y = torch.tensor([1., 2.]).mps()
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [26], in <cell line: 1>()
----> 1 y = torch.tensor([1., 2.]).mps()

AttributeError: 'Tensor' object has no attribute 'mps'