/**
 * Prefixes SVG `id` attributes and matching `url(#…)` / `#…` references under
 * `svgRoot` so multiple instances of the same SVG do not collide in the
 * document. Idempotent when called again with the same `idPrefix`.
 *
 * Fast path: returns immediately when the SVG has no `[id]` attributes.
 *
 * Walks elements and reads attributes directly instead of building attribute
 * selectors — namespaced attrs like `xlink:href` are not valid in
 * `querySelectorAll('[xlink:href]')`.
 */
export declare function uniquifySvgDomIds(svgRoot: SVGElement, idPrefix: string): void;
