docs: public static final GVRPickedObject pickSceneObject(GVRSceneObject sceneObject) {
          GVRCameraRig cam = sceneObject.getGVRContext().getMainScene().getMainCameraRig();
          GVRTransform t = cam.getHeadTransform();
          float[] lookat = cam.getLookAt();
          return NativePicker.pickSceneObject(sceneObject.getNative(), t.getPositionX(), t.getPositionY(), t.getPositionZ(),
                  lookat[0], lookat[1], lookat[2]);
      }