import { FirestoreError, SnapshotListenOptions, OnSnapshot } from '../types';
export declare const isOptions: (arg: import("@react-native-firebase/firestore").FirebaseFirestoreTypes.SnapshotListenOptions | ((error: FirestoreError) => void) | (() => void) | undefined) => arg is import("@react-native-firebase/firestore").FirebaseFirestoreTypes.SnapshotListenOptions;
export declare const onSnapshot: OnSnapshot;