/**
 * Monitors resizing on the panel splitter with the provided `panelId`
 * and writes the resizing width to the `cssVar` on the root element (`<html>`).
 */
export declare function useResizingWidthCssVarOnRootElement({ isEnabled, cssVar, panelId, }: {
    isEnabled?: boolean;
    cssVar: string;
    panelId: symbol;
}): void;