code: public void unload(final String assetPath) {
          if (assetManager.isLoaded(assetPath) || scheduledAssets.contains(assetPath)) {
              assetManager.unload(assetPath);
          } else if (eagerAssetManager.isLoaded(assetPath)) {
              eagerAssetManager.unload(assetPath);
          }
      }
docs: Schedules disposing of the selected asset.
  
  @param assetPath internal path to the asset.