protected void onSelectionChanged() {
    // do nothing, just a hook which can be overwritten by derived classes
  }
Creates a new mapping between raw node and yfiles node.

@param node The yfiles node.
@param rawNode The raw node.
java/zylib/src/main/java/com/google/security/zynamics/zylib/yfileswrap/gui/zygraph/nodes/ZyGraphNode.java