DOC Describes behavior for None in module.register_* (#60125)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/45834
Pull Request resolved: https://github.com/pytorch/pytorch/pull/60125
Reviewed By: zou3519
Differential Revision: D29196138
Pulled By: jbschlosser
fbshipit-source-id: af736c0d66005ec33412860f00b233a5d2922137
