private void setRootContainer(final @NotNull RadRootContainer rootContainer) {
    if (myRootContainer != null) {
      myLayeredPane.remove(myRootContainer.getDelegee());
    }
    myRootContainer = rootContainer;
    setDesignTimeInsets(2);
    myLayeredPane.add(myRootContainer.getDelegee(), LAYER_COMPONENT);

    fireHierarchyChanged();
  }
private void setRootContainer(final @NotNull RadRootContainer rootContainer)