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

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

JComboBox needs special handling

Began life as a copy of #1007147