GitLab

* Handle len(cached_x.grad_fn.next_functions) == 1 in cached_cast

* Unskip the unit tests related to len(cached_x.grad_fn.next_functions) == 1
Co-authored-by: David Fan <jiafa@microsoft.com>

* Skip failing unit tests

* Modify the test skipping messages

* Refactor to allow more flexible treatment of multiple optimizers/models/losses

* Adding _process_optimizers.py

* Created L0 tests (now passing).

* fix: minor print typo (#234)

* make L1 results easier to read

* L0 multiple model/optimizer/loss test fleshed out

* Adding test that master params remain synced across distributed processes

* Docstring updates

* Docstring updates