The cached response body.
The epoch millisecond at which the entry expires.
OptionalrootThe GraphQL document's single selected root field, for GraphQL query
POST entries, the scoping key for root-field invalidation (see
deleteRootFieldsForUrl). undefined for GET entries and for
documents whose root field could not be attributed (a
fragment-spread root, a multi-field selection); such entries are
dropped by every scoped invalidation, fail-closed.
A single cached response entry.