/** * vis-timeline - timeline-graph2d * https://github.com/visjs/vis-timeline * * Create a fully customizable, interactive timeline with items and ranges. * * @version 0.0.0-no-version * @date 2019-11-08T14:16:29Z * * @copyright (c) 2011-2017 Almende B.V, http://almende.com * @copyright (c) 2018-2019 visjs contributors, https://github.com/visjs * * @license * vis.js is dual licensed under both * * 1. The Apache 2.0 License * http://www.apache.org/licenses/LICENSE-2.0 * * and * * 2. 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