type IdRefs = string | null | undefined;
/**
 * Returns a unique set of id refs from the provided string
 * @param ids - string of id refs
 */
export default function idRefs(ids: IdRefs): Set<string>;
/**
 * Returns an updated id ref string with the provided id value added
 * @param ids - string of id refs
 * @param id - id to add
 */
export declare function addIdRef(ids: IdRefs, id: string): string;
/**
 * Returns an updated id ref string with the provided id value removed
 * @param ids - string of id refs
 * @param id - id to remove
 */
export declare function removeIdRef(_ids: IdRefs, id: string): string;
/**
 * Returns if an id ref string contains the provided id value
 * @param ids - string of id refs
 * @param id - id to check if it exists in the provided idRef string
 */
export declare function hasIdRef(ids: IdRefs, id: string): boolean;
export {};