code: function (event) {
              if (this._cfg.validationDelay) {
                  if (this._valTimer) {
                      ariaCoreTimer.cancelCallback(this._valTimer);
                  }
  
                  this._valTimer = ariaCoreTimer.addCallback({
                      fn : this.checkValue,
                      scope : this,
                      args : {
                          delayedValidation : true
                      },
                      delay : this._cfg.validationDelay
                  });
              }
          }
docs: Internal method to handle the onkeyup event. This is called to set the value property in the data model
  through the setProperty method that also handles all other widgets bound to this value.
  @protected