/**
 * Create an extension for `mdast-util-from-markdown` to enable GFM autolink
 * literals in markdown.
 *
 * @returns {FromMarkdownExtension}
 *   Extension for `mdast-util-to-markdown` to enable GFM autolink literals.
 */
export function gfmAutolinkLiteralFromMarkdown(): FromMarkdownExtension;
/**
 * Create an extension for `mdast-util-to-markdown` to enable GFM autolink
 * literals in markdown.
 *
 * @returns {ToMarkdownExtension}
 *   Extension for `mdast-util-to-markdown` to enable GFM autolink literals.
 */
export function gfmAutolinkLiteralToMarkdown(): ToMarkdownExtension;
import type { Extension as FromMarkdownExtension } from 'mdast-util-from-markdown';
import type { Options as ToMarkdownExtension } from 'mdast-util-to-markdown';