import { Cursor, Region, Context } from '../../core';
import { BlockRule } from './block';
import { HtmlElementNode } from '../../nodes';
export declare class HeadingRule extends BlockRule {
    marker: string;
    minLevel: number;
    maxLevel: number;
    level: number;
    constructor(ctx: Context, options: {
        marker?: string;
        minLevel: number;
        maxLevel: number;
    });
    protected scanBlock(cursor: Cursor): Region | null;
    protected parseSubRegion(region: Region): HtmlElementNode;
}