export interface ViewpointState {
    storeViewpointState(): any;
    restoreViewpointState(state: any): void;
}
export declare class ViewpointTools {
    stateHandlers: Map<string, ViewpointState>;
    registerStateHandler(name: string, handler: ViewpointState): void;
    storeState(): {
        [key: string]: any;
    };
    restoreState(state: {
        [key: string]: any;
    }): void;
    dispose(): void;
}