import { SnapshotListenOptions } from '.';
export declare enum GetOptions {
    Default = "default",
    Server = "server",
    Cache = "cache"
}
export declare enum DocumentChangeType {
    Added = "added",
    Removed = "removed",
    Modified = "modified"
}
type Observer<SnapshotType> = {
    complete?: () => void;
    error?: (error: Error) => void;
    next?: (snapshot: SnapshotType) => void;
};
export type OnSnapshotParameters<SnapshotType> = [observer: Observer<SnapshotType>] | [options: SnapshotListenOptions, observer: Observer<SnapshotType>] | [onNext: (snapshot: SnapshotType) => void, onError?: (error: Error) => void, onCompletion?: () => void] | [options: SnapshotListenOptions, onNext: (snapshot: SnapshotType) => void, onError?: (error: Error) => void, onCompletion?: () => void];
export declare function parseOnSnapshotArgs<SnapshotType>(args: OnSnapshotParameters<SnapshotType>): SnapshotListenOptions & Observer<SnapshotType>;
export {};