code: function getGestureEventName (gesture, active) {
    var eventName;
  
    if (!gesture) { return; }
  
    eventName = EVENTS[gesture];
    if (eventName === 'grip') {
      return eventName + (active ? 'close' : 'open');
    }
    if (eventName === 'point' || eventName === 'thumb') {
      return eventName + (active ? 'up' : 'down');
    }
    if (eventName === 'pointing' || eventName === 'pistol') {
      return eventName + (active ? 'start' : 'end');
    }
    return;
  }
docs: Suffix gestures based on toggle state (e.g., open/close, up/down, start/end).
  
  @param {string} gesture
  @param {boolean} active