Scripting API

CollectionPool<TCollection, TItem>

class in UnityEngine.Pool · UnityEngine.CoreModule

Not in Unity's public API, or in an assembly the coverage doesn't count.
In Tassix

A shared pool of collections, cleared as they're released.

Methods 2

static TCollection Get()
static PooledObject<TCollection> Get(out TCollection value)
static void Release(TCollection toRelease)