export interface WidgetConstructor<T extends object> {
    new (attributes?: T, children?: Widget[]): Widget;
}
/**
 * Widgets are the building blocks of [[Controller]]s. They represent a visual component on the client side; their usage is determined solely by the client.
 */
export interface Widget {
    /**Metadata holding the class name of the Widget, so it can be mapped back to the class from a JSON */
    __variant__: string;
}
export declare class Widget {
    /**
     * Maps a JSON object to an instance of its class
     */
    static fromJSON(json: any): Widget;
}
/**
 * A function to create an instance of a [[Widget]], intended to be used for JSX
 */
export declare const createWidget: <T extends WidgetConstructor<any>>(widget: T, attributes?: object, ...children: Widget[]) => Widget;