code: function (oEvent) {
  			var oColumn = oEvent.getParameter("column"),
  				bNewVisibilityState = oEvent.getParameter("newVisible");
  			if (!this.model.getProperty("/persistingSettings")) {
  				return;
  			}
  			oColumn.setVisible(bNewVisibilityState);
  			this.persistVisibleColumns();
  		}
docs: On column visibility change persist column visibility selection
  @param {object} oEvent event