onStateChange(oEvent) {
			const sLayout = oEvent.getParameter("layout");
			const iColumns = oEvent.getParameter("maxColumnsCount");

			if (iColumns === 1) {
				this.getModel("appView").setProperty("/smallScreenMode", true);
			} else {
				this.getModel("appView").setProperty("/smallScreenMode", false);
				// switch back to two column mode when device orientation is changed
				if (sLayout === "OneColumn") {
					this._setLayout("Two");
				}
			}
		}
React to FlexibleColumnLayout resize events.
Hides navigation buttons and switches the layout as needed.
@param {sap.ui.base.Event} oEvent the change event