/**
 *    ____       _   _     _____ _           _ _                _         
 *   |  _ \ __ _| |_| |__ |  ___(_)_ __   __| (_)_ __   __ _   (_)___     
 *   | |_) / _` | __| '_ \| |_  | | '_ \ / _` | | '_ \ / _` |  | / __|    
 *   |  __/ (_| | |_| | | |  _| | | | | | (_| | | | | | (_| |_ | \__ \    
 *   |_|   \__,_|\__|_| |_|_|   |_|_| |_|\__,_|_|_| |_|\__, (_)/ |___/    
 *                                                     |___/ |__/         
 *   https://github.com/qiao/PathFinding.js
 */
