code: public String getRedirectURL(FacesContext context,
                                   String viewId,
                                   Map<String,List<String>>parameters,
                                   boolean includeViewParams) {
          
          return getActionURL(context, viewId);
  
      }
docs: <p class="changed_added_2_0"> Return a JSF action URL derived
  from the <code>viewId</code> argument that is suitable to be used
  by the {@link NavigationHandler} to issue a redirect request to
  the URL using a NonFaces request.  Compliant implementations
  must implement this method as specified in section JSF.7.6.2.
  The default implementation simply calls through to {@link
  #getActionURL}, passing the arguments <code>context</code> and
  <code>viewId</code>.</p>
  
  @param context           The FacesContext processing this request
  @param viewId            The view identifier of the target page
  @param parameters        A mapping of parameter names to one or more values
  @param includeViewParams A flag indicating whether view parameters should be encoded into this URL
  @since 2.0