export declare function injectLightDomStyles(): void;
/**
 * True when the element is painted via a CSS mask (the icon-as-mask pattern),
 * either on the element itself or on its ::before / ::after pseudo-elements
 * (the most common icon-system layout: an empty element with the mask on a pseudo).
 */
export declare function isMaskedGraphic(el: Element): boolean;
/**
 * Light-DOM hiding rules cannot cross shadow boundaries, so when piercing shadow
 * roots we inject an equivalent stylesheet directly into each pierced root. The
 * style is added while loading and removed on reveal/teardown.
 */
export declare function hideShadowRoot(root: ShadowRoot): void;
export declare function unhideShadowRoot(root: ShadowRoot): void;