import type { Root } from 'mdast';
/**
 * Unwraps paragraph children inside JSX heading elements (h1–h6).
 *
 * The custom-ID preprocessor emits headings like `<h2 id="x">\nText\n</h2>`,
 * and MDX parses the text on its own line as a paragraph block. This plugin
 * flattens those paragraphs so the heading receives inline children directly.
 */
export declare const remarkUnwrapJsxHeadings: () => (tree: Root) => void;