* javax.swing.plaf.basic.BasicInternalFrameUI#createNorthPane(javax.swing
* .JInternalFrame)
*/
@Override
protected JComponent createNorthPane(JInternalFrame w) {
this.titlePane = new SubstanceInternalFrameTitlePane(w);
// f.putClientProperty(INTERNAL_FRAME_PINNED, Boolean.TRUE);
return this.titlePane;
}