ProjectController projectController = Lookup.getDefault().lookup(ProjectController.class);
Workspace currentWorkspace = projectController.getCurrentWorkspace();
AttributeModel sourceAttributeModel = attributeController.getModel(currentWorkspace);
AttributeModel destAttributeModel = attributeController.getModel(workspace);
destAttributeModel.mergeModel(sourceAttributeModel);
GraphModel sourceModel = graphController.getModel(currentWorkspace);
GraphModel destModel = graphController.getModel(workspace);
Graph destGraph = destModel.getHierarchicalGraphVisible();
Graph sourceGraph = sourceModel.getHierarchicalGraphVisible();