tree 2868de7920095ad96777b3e972ba30efbfe760ca
parent a8ca1fb0e6154b5e3dd700c9b59ce57ea964d1f7
author Martin Fick <mfick@codeaurora.org> 1636033738 -0600
committer Martin Fick <mfick@codeaurora.org> 1642013595 +0000

Return Optional<Task> in Task.Config

Instead of returning null when a task is not available, return an
Optional<Task> to help clarify expectations and make maintenance easier.
To avoid API confusion with java Optional, use the term "expression"
instead of "name" and "optional" for task expressions which can be
optional, and improve the docs.

Change-Id: Ifb4b6556e0a87ebbebb4b57d5f22b985ea87c695