docs: private boolean checkExistingCertificate() {
  		boolean alreadyexists = txt_PubCert.getDocument().getLength() > MIN_CERT_LENGTH;
  		if (alreadyexists) {
  			final int result = JOptionPane.showConfirmDialog(this,
  					Constant.messages.getString("dynssl.message2.caalreadyexists")
  					+ "\n"
  					+ Constant.messages.getString("dynssl.message2.willreplace")
  					+ "\n\n"
  					+ Constant.messages.getString("dynssl.message2.wanttooverwrite"),
  					Constant.messages.getString("dynssl.message2.title"),
  					JOptionPane.YES_NO_OPTION);
  			alreadyexists = !(result == JOptionPane.YES_OPTION);
  		}
  		return alreadyexists;
  	}