static <A extends JComponent> A setFontSize(int size, A a) {
  if (a != null) a.setFont(a.getFont().deriveFont((float) size));
  ret a;
}

static <A extends JComponent> A setFontSize(A a, int size) {
  ret setFontSize(size, a);
}

static <A extends JComboBox> A setFontSize(A a, int size) {
  ret setFontSize(a.getEditor().getEditorComponent(), a);
}