code: function isFromCallback (callbackContext = null) {
          const fromCallback = this.action(true)._isFromCallback;
  
          if (callbackContext === null) {
              return !!fromCallback;
          }
          return fromCallback === callbackContext;
      }
docs: Returns true, when user is comming back from callback
  Comeback is initialised with `res.proceedCallback()` or quick reply
  Usefull for hidding the text, user has already seen
  
  @param {string} [callbackContext]
  @returns {boolean}
  @alias module:callbackMiddleware
  @deprecated - use res.runBookmark()
  @example
  bot.use(['fooRoute', /^foo$/], (req, res) => {
  // set callback, only when this request does not have one
  if (!req.isFromCallback()) {
  res.text('this is the response, you dont want to read again');
  }
  });