_getNotificationDataGroup( streams ) {
		const settings = this.settings.content.notification.click_group;

		return new NotificationData({
			title: this.intl.t( "services.notification.dispatch.group" ).toString(),
			message: streams.map( stream => ({
				title: get( stream, "user.display_name" ),
				message: stream.title || ""
			}) ),
			icon: iconGroup,
			click: () => this._notificationClick( streams, settings ),
			settings
		});
	}
Show multiple streams as one notification
@param {TwitchStream[]} streams
@returns {NotificationData}