button.setToolTipText(nodeName + ":" + hostName + ":unknown");
button.setToolTipText("Node " + nodeName + " (" + hostName + "), unknown");
  private NodeStatusButton createStatusButton(String nodeName, String hostName) {    NodeStatusButton button =      new NodeStatusButton(new ColoredCircle(NodeStatusButton.unknownStatus, 20, null));    button.setSelectedIcon(new SelectedColoredCircle(NodeStatusButton.unknownStatus, 20, null));    button.setToolTipText(nodeName + ":" + hostName + ":unknown");    button.setActionCommand(nodeName);    button.setFocusPainted(false);    button.setBorderPainted(false);    button.setContentAreaFilled(false);    button.setMargin(new Insets(2,2,2,2));    return button;  }