tree 1350d7866cb0acf984ead17536e7ef8597f61e63
parent 4ad49266ec299af8b24f503ca04941d571c0c7ce
author Eric Anderson <ejona@google.com> 1618341874 -0700
committer Eric Anderson <ejona86@gmail.com> 1618590976 -0700

context: Add docs describing common Key usage

This recently came up in https://stackoverflow.com/a/67062503/4690866,
but it has come up multiple times before. These docs aren't ideal, as
they may be missed by a reader and so references in other parts of the
API would probably be appropriate. There could also be something about
"Context is not a general purpose map." But this is an improvement, and
I didn't want to let the perfect be the enemy of the good.