xhr.open(HTTP_GET, fragmentUrl);
xhr.setOnReadyStateChange(new ReadyStateChangeHandler() {
public void onReadyStateChange(XMLHttpRequest ignored) {
if (xhr.getReadyState() == XMLHttpRequest.DONE) {
xhr.clearOnReadyStateChange();
if ((xhr.getStatus() == HTTP_STATUS_OK || xhr.getStatus() == HTTP_STATUS_NON_HTTP)
&& xhr.getResponseText() != null
&& xhr.getResponseText().length() != 0) {
try {
gwtInstallCode(xhr.getResponseText());