code: protected String toActionUrl(Class<?> actionType, UrlChain chain) {
          assertArgumentNotNull("actionType", actionType);
          assertArgumentNotNull("chain", chain);
          return actionPathResolver.toActionUrl(actionType, chain);
      }
docs: Convert to URL string to move the action.
  <pre>
  <span style="color: #3F7E5E">// /product/list/3</span>
  String url = toActionUrl(ProductListAction.<span style="color: #70226C">class</span>, moreUrl(3));
  </pre>
  @param actionType The class type of action that it redirects to. (NotNull)
  @param chain The chain of URL to build additional info on URL. (NotNull)
  @return The URL string to move to the action. (NotNull)