public static function load(Tree $tree, array $xrefs): void
    {
        $rows = DB::table('individuals')
            ->where('i_file', '=', $tree->id())
            ->whereIn('i_id', array_unique($xrefs))
            ->select(['i_id AS xref', 'i_gedcom AS gedcom'])
            ->get();

        foreach ($rows as $row) {
            self::getInstance($row->xref, $tree, $row->gedcom);
        }
    }