code: static void loadTexture(GVRContext gvrContext,
              CancelableCallback<GVRCompressedCubemapImage> callback,
              GVRAndroidResource resource, int priority, Map<String, Integer> map) {
          faceIndexMap = map;
          AsyncManager.get().getScheduler().registerCallback(gvrContext, TEXTURE_CLASS, callback,
                  resource, priority);
      }
docs: /*
  The API