export declare type TProtocol = string;
export declare type TEvent = string;
export declare type TClientId = string;
export declare type TClientIdStorage = TClientId[];
export declare type TEventsStorage = Map<TEvent, TClientIdStorage>;
export declare type TProtocolsStorage = Map<TProtocol, TEventsStorage>;
export default class SubscriptionsHolder {
    private _subscriptions;
    subscribe(protocol: string, event: string, clientID: string): boolean;
    unsubscribe(clientID: string, protocol: string, event?: string): boolean;
    get(protocol: string, event: string): TClientId[];
    removeClient(clientID: string): void;
    clear(): void;
    getInfo(): Map<string, number>;
}