static <A extends JTextComponent> A setTextKeepCaret(fS text, final A c) {
  if (c != null) swing {
    int caret = c.getCaretPosition();
    if (neq(c.getText(), text)) {
      c.setText(text);
      setCaretPosition(c, caret);
    }
  }
  ret c;
}

static <A extends JTextComponent> A setTextKeepCaret(A c, S text) {
  ret setTextKeepCaret(text, c);
}