code: @Deprecated
      public static ResourceHandler.Builder classpathHandler(String classpathRoot) {
          return new Builder().withResourceProviderFactory(ResourceProviderFactory.classpathBased(classpathRoot));
      }
docs: Creates a handler that serves files from the classpath..
  @param classpathRoot A classpath directory, such as <code>/web</code>
  @return A new builder.
  @deprecated Use {@link ResourceHandlerBuilder#classpathHandler(String)}