docs: @Override
  	protected JPanel getWorkPanel() {
  		if (mainPanel == null) {
  			mainPanel = new JPanel(new BorderLayout());
  
  			tabbedPane = new JTabbedPane();
  			tabbedPane.addTab(Constant.messages.getString("spider.panel.tab.urls"), getUrlsTableScrollPane());
  			tabbedPane.addTab(Constant.messages.getString("spider.panel.tab.addednodes"), getAddedNodesTableScrollPane());
  			tabbedPane.addTab(Constant.messages.getString("spider.panel.tab.messages"), getMessagesTableScrollPanel());
  			tabbedPane.setSelectedIndex(0);
  
  			mainPanel.add(tabbedPane);
  		}
  		return mainPanel;
  	}