Use classmethods for overrides (#64841)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64841
Test Plan: Imported from OSS
Reviewed By: heitorschueroff
Differential Revision: D30991424
Pulled By: albanD
fbshipit-source-id: 551e2119768f3a4292713f3bfa83930f5506adbd
