pytorch

2ec4f69b - [DDP Comm Hook] Do not expose hook_then_optimizer as a public method (#62532)

[DDP Comm Hook] Do not expose hook_then_optimizer as a public method (#62532) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/62532 This method is not stable at this time, so avoid releasing it when DDP communication hook feature is released as a stable feature. ghstack-source-id: 134787831 Test Plan: buck test mode/dev-nosan caffe2/test/distributed:c10d -- test_ddp_hook_with_optimizer_parity buck test mode/dev-nosan caffe2/test/distributed:distributed_nccl_fork -- test_hook_then_optimizer_nccl Reviewed By: rohan-varma Differential Revision: D30031222 fbshipit-source-id: e03a8e13fee5116a5ddd724eb76316ee98f2a676