code: @Override
      public void setViewResolvers(List viewResolvers) {
          super.setViewResolvers(viewResolvers);
          this.flowViewResolver =
                  new FallbackDelegatingFlowViewResolver(
                          Collections.<FlowViewResolver>singletonList(flowResourceFlowViewResolver),
                          viewResolvers);
      }
docs: Sets the chain of Spring MVC {@link ViewResolver view resolvers} to delegate to resolve views
  selected by flows. Allows for reuse of existing View Resolvers configured in a Spring
  application context. If multiple resolvers are to be used, the resolvers should be ordered in
  the manner they should be applied.
  
  @param viewResolvers the view resolver list