bp_get_the_notification_time_since()

	function bp_get_the_notification_time_since() {

		// Get the notified date.
		$date_notified = bp_get_the_notification_date_notified();

		// Notified date has legitimate data.
		if ( '0000-00-00 00:00:00' !== $date_notified ) {
			$retval = bp_core_time_since( $date_notified );

		// Notified date is empty, so return a fun string.
		} else {
			$retval = __( 'Date not found', 'buddyboss' );
		}

		/**
		 * Filters the time since value of the current notification.
		 *
		 * @since BuddyPress 1.9.0
		 *
		 * @param string $retval Time since value for current notification.
		 */
		return apply_filters( 'bp_get_the_notification_time_since', $retval );
	}