OutlineIterator
class OutlineIterator extends Userdata<"fz_outline_iterator"> { }
delete(): number;
down(): number;
insert(item: OutlineItem): number;
item(): OutlineItem | null;
next(): number;
prev(): number;
up(): number;
update(item: OutlineItem): void;
static readonly RESULT_AT_EMPTY: number;
static readonly RESULT_AT_ITEM: number;
static readonly RESULT_DID_NOT_MOVE;