Declare NamedTuple at top level (#53273)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53273
This prevents a mypy bug. Fixes #53272
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: rohan-varma
Differential Revision: D26819428
Pulled By: ezyang
fbshipit-source-id: e71575ed13321665a976cc5ef8b2993c00626b7d
