src/vs/base/browser/ui/selectBox/selectBoxCustom.ts/SelectBoxList/setOptionsList
class SelectBoxList:	private setOptionsList() {

		// Mirror options in drop-down
		// Populate select list for non-native select mode
		if (this.selectList) {
			this.selectList.splice(0, this.selectList.length, this.options);
		}
	}