Reapply Wrap workaround for cpp custom types a bit prettier and add an example" (#19062)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19062
As a temporary demonstration on how to extend this hack further until custom C types are ready.
Reviewed By: ezyang
Differential Revision: D14817809
fbshipit-source-id: 6eaf731e9135313eb858e178abcd9f25380ab8fe
