final TextBox oneTimeCharacterIdTextBox = display.getOneTimeCharacterIdTextBox();
final ListBox oneTimeLevelListBox = display.getOneTimeLevelListBox();
final TextArea importCsvTextArea = display.getImportCsvTextArea();
final ListBox fullApiKeyCharacterListBox = display.getFullApiKeyCharacterListBox();
final ListBox fullApiKeyLevelListBox = display.getFullApiKeyLevelListBox();
staticHandlerRegistrations.add(oneTimeUserIdTextBox.addChangeHandler(new OnlyDigitsChangeHandler(oneTimeUserIdTextBox, 15)));
staticHandlerRegistrations.add(oneTimeCharacterIdTextBox.addChangeHandler(new OnlyDigitsChangeHandler(oneTimeCharacterIdTextBox, 15)));
staticHandlerRegistrations.add(importXmlTextArea.addChangeHandler(new ChangeHandler() {
@Override
public void onChange(ChangeEvent event) {
if (importXmlTextArea.getText().length() > 0) {
importCsvTextArea.setEnabled(false);