/**
 * If the indexer found webhook declarations the server would refuse (a duplicate endpoint id, a
 * subscriber on an undefined endpoint, a reused subscriber id), report them to the parent via
 * WEBHOOKS_FAILED_TO_INDEX and return true. Callers must stop indexing (skip INDEX_COMPLETE) when
 * this returns true.
 */
export declare function reportWebhookIndexingErrors(send: (message: unknown) => void): Promise<boolean>;