Public shape provided by SpawnerMixin.
Read-only snapshot of the current spawn set.
Membership predicate.
Record spawned as a runtime child of this Spawner. Idempotent.
spawned
Drop spawned from this Spawner's runtime collection. Returns true if it was present. Used by Spawned.cleanupOnDestruct for R2.4 symmetric cleanup; also callable by content code that wants to transfer ownership of a spawn elsewhere.
Spawned.cleanupOnDestruct
Public shape provided by SpawnerMixin.