unavailableOf

function · packages/remote/src/selection.ts:326

function unavailableOf(
  store: EntityStore,
  key: string,
  requirement: RelationRequirement,
): string | undefined

The first field requirement reads, at any depth, that the server settled without a value, as Entity:id.field. A read that consults it says why it cannot assemble rather than waiting on a field nothing will fetch.