Method getSourceByID

modules/core/ImagerySystem.js:441–448

* getSource * Returns an ImagerySource for the given `sourceID` * @param {string} sourceID - The sourceID to get * @return {ImagerySource?} The `ImagerySource` with the given ID, or `null` if not found

(sourceID)

   * @return  {ImagerySource?}  The `ImagerySource` with the given ID, or `null` if not found
   */
  getSourceByID(sourceID) {
    if (!this._imageryIndex) return null;   // called before init()?

    if (/^EsriWayback/i.test(sourceID)) {   // ignore start date, if any
      sourceID = 'EsriWayback';
    }
    return this._imageryIndex.sources.get(sourceID.toLowerCase());
  }


  /**