apply_filters( 'pre_get_blogs_of_user', null|object[] $sites, int $user_id, bool $all )

1051	 *1052	 * @param null|object[] $sites   An array of site objects of which the user is a member.1053	 * @param int           $user_id User ID.1054	 * @param bool          $all     Whether the returned array should contain all sites, including1055	 *                               those marked 'deleted', 'archived', or 'spam'. Default false.1056	 */1057	$sites = apply_filters( 'pre_get_blogs_of_user', null, $user_id, $all );1058 1059	if ( null !== $sites ) {1060		return $sites;1061	}1062 1063	$keys = get_user_meta( $user_id );