docs: public void loadModel(final GVRSceneObject model, final GVRResourceVolume volume, final EnumSet<GVRImportSettings> settings, final GVRScene scene)
      {
          Threads.spawn(new Runnable()
          {
              public void run()
              {
                  String filePath = volume.getFileName();
                  AssetRequest assetRequest = new AssetRequest(model, volume, scene, null, false);
                  String ext = filePath.substring(filePath.length() - 3).toLowerCase();
  
                  model.setName(assetRequest.getBaseName());
                  assetRequest.setImportSettings(settings);
                  try
                  {
                      if (ext.equals("x3d"))
                      {
                          loadX3DModel(assetRequest, model);
                      }
                      else
                      {
                          loadJassimpModel(assetRequest, model);
                      }
                  }
                  catch (IOException ex)
                  {
                      // onModelError is generated in this case.
                  }
              }
          });
      }