import { MessageBusService } from './message-bus/message-bus-service';
export declare class Loader {
    private bus?;
    static LOADERS: string;
    static LOADER_UPDATED: string;
    loading: boolean;
    protected loaders: {
        [key: string]: any;
    };
    constructor(bus?: MessageBusService | undefined);
    addLoader(id?: string, title?: string): string;
    removeLoader(id: string): void;
    getLoaders(): {
        [key: string]: string;
    };
}