export declare function resolveIdReferencesIn(root:Node,value:string|null):Element[];
/** Reflects a host's `aria-controls` relationship onto its shadow semantic control. */
export declare function syncAriaControlsElements(host:HTMLElement,control:HTMLElement|undefined,controls:string|null):void;
/** Reflects a host's `aria-describedby` relationship onto its shadow semantic control. */
export declare function syncAriaDescribedByElements(host:HTMLElement,control:HTMLElement|undefined,describedBy:string|null):boolean;