example of splitting up an FX graph into smaller subgraphs with own submodules (#45404)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/45404
Test Plan: Imported from OSS
Reviewed By: jamesr66a
Differential Revision: D23956147
Pulled By: Lilyjjo
fbshipit-source-id: a35e33a0b9f1ed5f3fb6e5cd146f66c29bf3d518
