bp_get_the_notification_action_links( array|string $args = '' )

	function bp_get_the_notification_action_links( $args = '' ) {
		// Set default user ID to use.
		$user_id = isset( $args['user_id'] ) ? $args['user_id'] : bp_displayed_user_id();

		// Parse.
		$r = wp_parse_args( $args, array(
			'before' => '',
			'after'  => '',
			'sep'    => ' | ',
			'links'  => array(
				bp_get_the_notification_mark_link( $user_id ),
				bp_get_the_notification_delete_link( $user_id )
			)
		) );

		// Build the links.
		$retval = $r['before'] . implode( $r['links'], $r['sep'] ) . $r['after'];

		/**
		 * Filters the action links for the current notification.
		 *
		 * @since BuddyPress 1.9.0
		 * @since BuddyPress 2.6.0 Added the `$r` parameter.
		 *
		 * @param string $retval HTML links for actions to take on single notifications.
		 * @param array  $r      Array of parsed arguments.
		 */
		return apply_filters( 'bp_get_the_notification_action_links', $retval, $r );
	}