tree 7a24c6235ea8a01dee89d046dd488e1d59f8d77c
parent a1383c66df8d43b6f814b4b399f663bd9ac1f7e5
author mstaib <mstaib@google.com> 1541452240 -0800
committer Copybara-Service <copybara-piper@google.com> 1541452358 -0800

Add a TrimmedConfigurationCache.

This cache is the first step to the prototype retroactive trimming mechanism,
and the heart of it.

It hasn't been much optimized; the expectation is that these operations will
need to be more heavily optimized for speed once the cache is in active use.

RELNOTES: None.
PiperOrigin-RevId: 220158685