docs: protected final void runOnGlThread(final Runnable r) {
          getGVRContext().runOnGlThread(new Runnable() {
              public void run() {
                  FPSCounter.timeCheck("runOnGlThread <START>: " + r);
                  r.run();
                  FPSCounter.timeCheck("runOnGlThread <END>: " + r);
              }
          });
      }