tree bc5bd12177d17a1c429f3cbca632a9d5dcc1199c
parent c220664f79a933eca55e260bb9568c7890e7a4f7
author Clayton Knittel <cknittel@google.com> 1758615372 -0700
committer Copybara-Service <copybara-worker@google.com> 1759618444 -0700

Introduce `FieldWithArena` to encapsulate field arena storage alongside an arena pointer.

We will be using this idiom for all other public field types that we're removing arena pointers from.

PiperOrigin-RevId: 810333648