/**
 * @module viw-webgl-react
 */
/** This overlay is designed to go over the viewer canvas to intercept and dispatch events to the viewer canvas.
 * The point is that quickly finding a ui hit avoids the browser hit detection to search through all elements.
 * When the tree view is open with 10+k elements this increases general fps significantly.
 */
export declare function Overlay(props: {
    canvas: HTMLCanvasElement;
}): import("react/jsx-runtime").JSX.Element;
