/**
 * Serialize a thematic break node.
 *
 * @param {ThematicBreak} _
 *   Node to serialize.
 * @param {Parents | undefined} _1
 *   Parent node.
 * @param {State} state
 *   Info passed around.
 * @returns {string}
 *   Serialized markdown.
 */
export function thematicBreak(_: ThematicBreak, _1: Parents | undefined, state: State): string;
import type { ThematicBreak } from 'mdast';
import type { Parents } from 'mdast';
import type { State } from 'mdast-util-to-markdown';
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