/**
@license
Copyright (c) 2015 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
*/

/**
@license
Copyright (c) 2017 Vaadin Ltd.
This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/

/**
@license
Copyright (c) 2018 Vaadin Ltd.
This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/

/**
@license
Copyright (c) 2019 Vaadin Ltd.
This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/