import { QueryDocumentSnapshot, DocumentData } from "firebase-admin/firestore";
/**
 * Handles events from the `watchlist` collection in Firestore, when a document is deleted, and decrements counter
 * in statistics in the `watchlist-stats` collection for the provided `entityId` and `entityType`.
 *
*/
export declare const onWatchlistItemDelete: (snapshot: QueryDocumentSnapshot<DocumentData>) => Promise<void>;