static <A extends JComponent> A setFontSize(final float size, final A a) {
  if (a == null) ret a;
  swing {
    Component _a = a;
    if (a instanceof JComboBox)
      _a = ((JComboBox) a).getEditor().getEditorComponent();
    _a.setFont(_a.getFont().deriveFont((float) size));
  }
  ret a;
}

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