import type { PerseusItem, PerseusRenderer } from "../data-schema";
/**
 * Returns a new PerseusItem whose question and hints contain only widgets
 * referenced by placeholders in their `content` string. Idempotent. Does not
 * mutate its argument.
 */
export declare function removeOrphanedWidgetsFromPerseusItem(item: PerseusItem): PerseusItem;
/**
 * Returns a new PerseusRenderer whose `widgets` map contains only widgets
 * referenced by placeholders in the `content` string. Idempotent. Does not
 * mutate its argument.
 */
export declare function removeOrphanedWidgets(renderer: PerseusRenderer): PerseusRenderer;