Standalone decorator symbol that references the strokes or text it decorates.
When standalone (in model.symbols): targetIds contains the referenced stroke IDs
and hasBounds is true with word-level bounding box.
When embedded (in TText.decorators[]): targetIds is empty and hasBounds is false
(the parent symbol's bounds are used at render time).
Standalone decorator symbol that references the strokes or text it decorates. When standalone (in model.symbols): targetIds contains the referenced stroke IDs and hasBounds is true with word-level bounding box. When embedded (in TText.decorators[]): targetIds is empty and hasBounds is false (the parent symbol's bounds are used at render time).