code: public boolean requestFocusIn(Container container) {
  		AbstractButton button = getButtonIn(container);
  		if (button != null) {
  			return button.requestFocusInWindow();
  		}
  		return false;
  	}
docs: Search for a button representing this command in the provided container
  and let it request the focus.
  
  @param container the container which holds the command button.
  @return <code>true</code> if the focus request is likely to succeed.
  
  @see #getButtonIn(Container)
  @see JComponent#requestFocusInWindow()