docs: function () {
                  var navManager = ariaTemplatesNavigationManager;
                  navManager.addGlobalKeyMap({
                      key : "ESCAPE",
                      modal : true,
                      callback : {
                          fn : this._raiseOnEscapeEvent,
                          scope : this
                      }
                  });
                  // global navigation is disabled in case of a modal popup
                  navManager.setModalBehaviour(true);
              }