/**
 * Adjust the gap between headings.
 *
 * There are no blank lines added if a heading is the first or last child of
 * the document, list item, or block quote.
 * For example, pass `{1: {before: 2, after: 2}}` to add two blank lines before
 * and after the main heading.
 * You can also set values to `0` to not add blank lines.
 *
 * @param {Readonly<Options> | null | undefined} [options]
 *   Configuration (optional).
 * @returns {undefined}
 *   Nothing.
 */
export default function remarkHeadingGap(options?: Readonly<Options> | null | undefined): undefined;
export type Heading = import('mdast').Heading;
export type Root = import('mdast').Root;
export type Processor = import('unified').Processor<undefined, undefined, undefined, Root>;
/**
 * Gap between a heading.
 */
export type Gap = {
    /**
     * Blank lines after a heading.
     */
    after?: number | null | undefined;
    /**
     * Blank lines before a heading.
     */
    before?: number | null | undefined;
};
/**
 * Configuration;
 */
export type Options = Partial<Record<Rank, Gap | null | undefined>>;
/**
 * Heading rank.
 */
export type Rank = Heading['depth'];