/**
 * @license
 * Copyright 2017 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * Throws an error if the provided assertion is falsy
 * @param {*} assertion The assertion to be tested for falsiness
 * @param {!string} message The message to display if the check fails
 */
export declare const assert: (assertion: any, message: any) => void;
/**
 * Returns an Error object suitable for throwing.
 * @param {string} message
 * @return {!Error}
 */
export declare const assertionError: (message: any) => Error;