code: public List<String> assets(final String name) {
      return fileset.getOrDefault(name, Collections.emptyList());
    }
docs: Get all the assets for the provided file set. Example:
  
  <pre>
  assets {
  fileset {
  home: [home.css, home.js]
  }
  }
  </pre>
  
  This method returns <code>home.css</code> and <code>home.js</code> for <code>home</code> file
  set. If there is no fileset under that name then it returns an empty list.
  
  @param name Fileset name.
  @return List of files or empty list.