/**
  * @return $this
  */
 public function setHighTrafficColor()
 {
     $this->map->setHighTrafficColor(TrafficMap\Color::ORANGE);
     return $this;
 }
 /**
  * @return $this
  */
 public function setGroundColor()
 {
     $this->map->setGroundColor(TrafficMap\Color::BLACK);
     return $this;
 }