static JTextPane jtextpane() {
  ret jenableUndoRedo(swing(func -> JTextPane { new JTextPane }));
}

static JTextPane jtextpane(S text, AttributeSet attributes) {
  JTextPane pane = jtextpane();
  pane.setCharacterAttributes(attributes, true);
  pane.setText(text);
  ret pane;
}

static JTextPane jtextpane(S text) {
  ret jtextpane(text, style_normal());
}