torch::nn::FractionalMaxPool{2,3}d module and functional
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/29933
Test Plan: Imported from OSS
Differential Revision: D18548174
Pulled By: yf225
fbshipit-source-id: 070776db6e8b7ad94d9b7cbd82b3d6966f061a46
