docs: private JButton getBtnEnableAll() {
  		if (btnEnableAll == null) {
  			btnEnableAll = new JButton();
  			btnEnableAll.setText(Constant.messages.getString("filter.button.enableall"));
  			btnEnableAll.setEnabled(false);
  			btnEnableAll.addActionListener(new java.awt.event.ActionListener() { 
  
  				@Override
  				public void actionPerformed(java.awt.event.ActionEvent e) {    
  
  
  				}
  			});
  
  		}
  		return btnEnableAll;
  	}