code: static SensorEvent obtain() {
          final SensorEvent event;
          synchronized (recyclerLock) {
              event = recyclerTop;
              if (event == null) {
                  return new SensorEvent();
              }
              recyclerTop = event.next;
              recyclerUsed -= 1;
          }
          event.next = null;
          return event;
      }
docs: Use this method to return a {@link SensorEvent} for use.
  
  @return the {@link SensorEvent} object.