/**
 * @license
 * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at
 * http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at
 * http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at
 * http://polymer.github.io/PATENTS.txt
 */
import { Document, ParsedHtmlDocument, Warning } from 'prax-analyzer';
import { Rule } from '../rule';
/**
 * An abstract rule that operates only over HTML files.
 */
export declare abstract class HtmlRule extends Rule {
    check(document: Document): Promise<Warning[]>;
    /**
     * Implement this method, rather than the `check` method.
     */
    abstract checkDocument(parsedDocument: ParsedHtmlDocument, document: Document): Promise<Warning[]>;
}