final Artist childO1 = childContext.newObject(Artist.class);
childO1.setArtistName("Master");
final ArtGroup childO2 = childContext.newObject(ArtGroup.class);
childO2.setName("Detail1");
childO2.addToArtistArray(childO1);
ObjEntity ent = childContext.getEntityResolver().getObjEntity("ArtGroup");
Collection<ObjRelationship> rels = ent.getDeclaredRelationships();
for (ObjRelationship rel : rels) {
System.out.println(rel.getName());