protected IHierarchicalNodeLayout getRootLayout( IHierarchicalNodeModel model, final IHierarchicalEdgeModel tubeModel) { IHierarchicalEdgeLayout tubeLayout = getHierarchicalEdgeLayout(model); IHierarchicalNodeLayout layout = getHierarchicalNodeLayout(model); layout.setTubeModel(tubeModel); layout.setTubeLayout(tubeLayout); return layout; }