Mapping domain objects to drawable object

What is the best way to map domain object to drawable objects ?
Browsing the JavaDoc, and I don’t see methods like get/set userobject ?

You’ll need to keep your own hash table mapping your domain objects to JGoObjects. To maintain this hash table, your document will need to notice the JGoDocumentEvents indicating when objects have been added or removed from the document. That’s most easily done in an override of JGoDocument.fireUpdate that looks for the JGoDocumentEvent.INSERTED or .REMOVED hint, with an object (actually JGoObject) that is something that you are interested in mapping to/from your domain objects.
JGoNode and JGoLink do have a “UserObject” property that you can set to provide a reverse mapping.