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