this.picker.onEnableChanged_(this);}});Polymer({is:'tr-ui-b-grouping-table-groupby-picker',created(){this.settingsKey_=undefined;},get settingsKey(){return this.settingsKey_;},set settingsKey(settingsKey){this.settingsKey_=settingsKey;if(this.$.container.children.length){this.restoreSetting_();}},restoreSetting_(){if(this.settingsKey_===undefined)return;this.currentGroupKeys=tr.b.Settings.get(this.settingsKey_,this.currentGroupKeys);},get possibleGroups(){return Array.from(this.$.container.children).map(g...