docs: private JCheckBox getChkUseProxyChain() {
  		if (chkUseProxyChain == null) {
  			chkUseProxyChain = new JCheckBox();
  			chkUseProxyChain.setText(Constant.messages.getString("conn.options.useProxy"));
  			chkUseProxyChain.addActionListener(new java.awt.event.ActionListener() { 
  
  				@Override
  				public void actionPerformed(java.awt.event.ActionEvent e) {    
  					setProxyChainEnabled(chkUseProxyChain.isSelected());
  				}
  			});
  
  		}
  		return chkUseProxyChain;
  	}