import { _web } from '../lib/firestore-types';
export declare const useQuerySnapData: <U, V = U>(querySnap: _web.QuerySnapshot<U> | undefined, transformer?: ((data: U, snap: _web.QueryDocumentSnapshot<U>) => V) | undefined) => V[] | undefined;
export declare const useDocumentSnapData: <U, V = U>(snap: _web.DocumentSnapshot<U> | undefined, transformer?: ((data: U, snap: _web.DocumentSnapshot<U>) => V) | undefined) => V | undefined;