whole_func_string: function(viewPath, locals, route) {
      if (typeof viewPath !== 'string') {
        locals = viewPath;
        viewPath = route.controller + '/' + route.action;
      }
      return [viewPath, locals];
    }
func_code_string: function(viewPath, locals, route) {
      if (typeof viewPath !== 'string') {
        locals = viewPath;
        viewPath = route.controller + '/' + route.action;
      }
      return [viewPath, locals];
    }
func_documentation_string: Support omitting view path; default it to ":controller/:action".