import { Diagnostic, Rule } from "@siteimprove/alfa-act";
import type { Document } from "@siteimprove/alfa-dom";
import { Err, Ok } from "@siteimprove/alfa-result";
import type { Page } from "@siteimprove/alfa-web";
declare const _default: Rule.Atomic<Page, Document, {}, Document>;
export default _default;
/**
 * @public
 */
export declare namespace Outcomes {
    const HasOneHeading: Ok<Diagnostic>;
    const HasNoHeadings: Err<Diagnostic>;
}
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