if (_countries != null) {
// Create an instance of our SortedReadableList class.
_countryList = new CountryList(_countries);
// Add our list to a KeywordFilterField object.
_keywordFilterField = new KeywordFilterField();
_keywordFilterField.setSourceList(_countryList, _countryList);
// We're providing a customized edit field for
// the KeywordFilterField.
final CustomKeywordField customSearchField =