import { Observable } from 'rxjs';
export declare class ButtonHubService {
    buttonsReady: boolean;
    private _previousButtonClicked;
    get previousButtonClicked(): Observable<any>;
    private _nextButtonClicked;
    get nextButtonClicked(): Observable<any>;
    private _cancelButtonClicked;
    get cancelButtonClicked(): Observable<any>;
    private _doneButtonClicked;
    get doneButtonClicked(): Observable<any>;
    private _customButtonClicked;
    get customButtonClicked(): Observable<any>;
    buttonClicked(buttonType: string): void;
}