code: function (oEvent) {
  			var bShowRuleProperties = true,
  				oSelectedRule = this.model.getProperty("/selectedRule"),
  				bAdditionalRulesetsTab = oEvent.getParameter("selectedKey") === "additionalRulesets";
  
  			if (bAdditionalRulesetsTab || !oSelectedRule) {
  				bShowRuleProperties = false;
  			}
  
  			// Ensure we don't make unnecessary requests. The requests will be made only
  			// the first time the user clicks AdditionalRulesets tab.
  			if (!this.bAdditionalRulesetsLoaded && bAdditionalRulesetsTab) {
  				this.rulesViewContainer.setBusyIndicatorDelay(0);
  				this.rulesViewContainer.setBusy(true);
  				CommunicationBus.publish(channelNames.GET_NON_LOADED_RULE_SETS, {
  					loadedRulesets: this._getLoadedRulesets()
  				});
  			}
  
  			this.getView().getModel().setProperty("/showRuleProperties", bShowRuleProperties);
  		}
docs: On selecting "Additional RuleSet" tab, start loading Additional RuleSets by brute search.
  @param {Event} oEvent TreeTable event