Summary:
The diff size is formidable, however it's not that bad really. This is just
about moving the code inside the macro and tests in a separate file.
This is similar to changesets or filenodes crates
Reviewed By: lukaspiatkowski
Differential Revision: D7639681
fbshipit-source-id: 4216652780bf99939245ae39e508b3b46cf96a03
