this.groupedDateLabels = {
[GroupDate.UNKNOWN]: null,
[GroupDate.TODAY]: this.i18n('Today'),
[GroupDate.YESTERDAY]: this.i18n('Yesterday'),
this.groupedDateLabels = {
[GroupDate.UNKNOWN]: null,
[GroupDate.TODAY]: this.i18n('Today'),
[GroupDate.YESTERDAY]: this.i18n('Yesterday'),