text: exports.getCallback = function (app, path) {
  
      if (app._router && app._router.stack) {
          for (var i = 0; i < app._router.stack.length; i++) {
              var current = app._router.stack[i];
              if (current.route && current.route.path && current.route.path == path) {
                  return current.route.stack[0].handle;
              }
          }
      }
  
      return null;
  }