/** @license
 *  Copyright 2016 - present The Material Motion Authors. All Rights Reserved.
 *
 *  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.
 */
import { Observer, ObserverOrNext } from './types';
/**
 * TypeScript is a pain to use with polymorphic types unless you wrap them in a
 * function that returns a single type.  So, that's what this is.
 *
 * If you give it an observer, you get back that observer.  If you give it an
 * anonymous function, you get back that anonymous function wrapped in an
 * observer.
 */
export declare function wrapWithObserver<T>(listener: ObserverOrNext<T>): Observer<T>;
export default wrapWithObserver;