/**
 * Coalesces redraw requests: no matter how many times it is asked,
 * the render runs once in the next frame (rAF; a microtask in
 * non-browser environments).
 */
export declare class RenderScheduler {
    private readonly render;
    private pending;
    constructor(render: () => void);
    schedule(): Promise<void>;
    /** Promise of the currently scheduled render (for waitForUpdate). */
    get settled(): Promise<void>;
}