import { ChangeFloorObserverManager } from './ChangeFloorObserverManager';
export declare class ChangeFloorNotifierManager {
    private observers;
    notifyChangeFloor(floorId: string): Promise<void>;
    notifyRemovedFloor(prevFloorId?: string): Promise<void>;
    addObserver(observer: ChangeFloorObserverManager): void;
    removeObserver(observer: ChangeFloorObserverManager): void;
    clearObserver(): void;
    private drawObservers;
    private undrawObservers;
}