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

979	 *980	 * @param null|object[] $sites   An array of site objects of which the user is a member.981	 * @param int           $user_id User ID.982	 * @param bool          $all     Whether the returned array should contain all sites, including983	 *                               those marked 'deleted', 'archived', or 'spam'. Default false.984	 */985	$sites = apply_filters( 'pre_get_blogs_of_user', null, $user_id, $all );986 987	if ( null !== $sites ) {988		return $sites;989	}990 991	$keys = get_user_meta( $user_id );