private void moveContent(final double dx, final double dy) {
    final Graph2D graph = (Graph2D) m_userData.getNode().getNode().getGraph();

    final HierarchyManager hm = graph.getHierarchyManager();
    // Find the children contained in the given group node.
    final NodeList childNodes = new NodeList();
    addChildren(hm, getNode(), childNodes);
    // Move the children.
    moveNodes(graph, childNodes.nodes(), dx, dy);
  }
Listeners that are notified about changes in the node realizer.
java/zylib/src/main/java/com/google/security/zynamics/zylib/yfileswrap/gui/zygraph/realizers/ZyGroupNodeRealizer.java