src/vs/workbench/contrib/preferences/browser/settingsTree.ts/SettingArrayRenderer/onDidChangeList
class SettingArrayRenderer:	private onDidChangeList(template: ISettingListItemTemplate, newList: string[] | undefined | null): void {
		if (!template.context || newList === null) {
			return;
		}

		this._onDidChangeSetting.fire({
			key: template.context.setting.key,
			value: newList,
			type: template.context.valueType
		});
	}