import type Core from 'markdown-it/lib/parser_core';
import type { IDGenerator } from '@diplodoc/utils';
/**
 * Creates a core rule that wraps folding headings in `<section>` elements with unique IDs.
 * @param externalGenerateID - Optional external ID generator (e.g. from MarkdownItPluginOpts).
 *   When provided, ensures all plugins share the same per-file generator.
 *   When omitted, uses random fallback behavior.
 * @returns Markdown-it core rule that injects section wrapper tokens around folding headings.
 */
export declare function createSectionsCoreRule(externalGenerateID?: IDGenerator): Core.RuleCore;