/**
Wrapper around BabylonJS XR/VR classes, whatever is available in current browser, if any.
Attached to a World, places the world mesh somewhere in real world TODO
 */
export class ARHelper {
    /**
    @param world attaches the control to the World
     */
    initXR(world: any, enter: any): Promise<this>;
    world: any;
    xr: any;
    featuresManager: any;
    hitTest: any;
    anchorSystem: any;
    tracker: (results: any) => void;
    enterAR(): Promise<any>;
    startTracking(): void;
    anchor: any;
    tracking: boolean;
    placeMarker(): Promise<void>;
    createMarker(): void;
    marker: any;
    logo: any;
    realWorldHeight(): number;
}