static JButton findButton(Component c, S name) {
  for (JButton b : childrenOfType(c, JButton.class))
    if (eq(b.getText(), name)) ret b;
  for (JButton b : childrenOfType(getFrame(c), JButton.class))
    if (eq(b.getText(), name)) ret b;
  null;
}

static JButton findButton(Component c) {
  ret childOfType(c, JButton.class);
}