import { WidgetDetails } from "./WidgetDetails";
import { WidgetNode } from "./WidgetNode";
export declare class WidgetCache {
    static root: WidgetNode | null;
    static addNodeToTree(node: WidgetNode): WidgetNode | undefined;
    static addWidgetToTree(widgetDetails: WidgetDetails): void;
    static getNodeFromTree(id: number): Promise<WidgetNode | null>;
    static removeNodeFromTree(id: number): Promise<void>;
    static countNumberOfNodes(): number;
}