collectionForReplay property

What the completed iterations of a suspended collection-literal for element produced, keyed by the element node (SCF43).

Replay re-evaluates the whole literal, so without this a loop would run its earlier iterations again, and resolvedAwaitResults, keyed by the await NODE every iteration shares, would hand the second iteration the first one's value. An entry is written only when an iteration SUSPENDS and is deleted when the literal completes, so it lives exactly across the replay window: a for element that never suspends (a sync helper called twice in one statement, a loop condition) never records anything.