code: function (graphicName) {
        if (!this.overlay) return;
        if (this.graphicName == graphicName) return;
  
        this.graphicName = graphicName;
        switch (graphicName) {
          case 'connect':
            this.overlay.style.display = 'block';
            this.overlay.innerHTML = CONNECT_LEAP_ICON;
            break;
          case 'wave':
            this.overlay.style.display = 'block';
            this.overlay.innerHTML = MOVE_HAND_OVER_LEAP_ICON;
            break;
          case undefined:
            this.overlay.innerHTML = '';
            break;
        }
      }
docs: Accepts either "connect", "wave", or undefined.