import { Literal } from 'mdast';
import { Node } from 'unist';
/**
 * Type guard for Literal.
 *
 * @param node - The node to test.
 * @returns True if node is Literal.
 */
export declare function isLiteral(node: Node): node is Literal;
/**
 * Type assertion for Literal.
 *
 * @param node - The node to test.
 */
export declare function assertLiteral(node: Node): asserts node is Literal;