Unfortunately, Seesaw tree support is pretty lame. JTree (and it's just the nasty cousin of JTable) is extremely complex, so coming up with a clean wrapper that spans many use cases has proven to be a difficult task.
, , TreeModel, DefaultTreeModel, . DefaultTreeModel - (/ ..) DefaultTreeModel, . , , .. , updateUI - , - .
, . . , - Seesaw, interop:)