return modifiers;
}
@Override
public void mouseClicked(MouseEvent e) {
if (checkModifiers(e)) {
<BUG>GUINode guiNode = (GUINode) canvas.getVertex(e);
Node node = guiNode == null? null : guiNode.getAssociatedNode();</BUG>
if (node != null) {
callback.getVisualizationState().pickNode(node);
callback.updateVisualizationAfterPick();

return modifiers;
}
@Override
public void mouseClicked(MouseEvent e) {
if (checkModifiers(e)) {
GUINode guiNode = canvas.getVertex(e);
Node node = guiNode == null? null : guiNode.getAssociatedNode();
if (node != null) {
callback.getVisualizationState().pickNode(node);
callback.updateVisualizationAfterPick();
