public void onResponseReceived( Request request, Response response ) {
if ( response.getStatusCode() == Response.SC_OK ) {
String json = response.getText();
System.out.println( json );
final JsonToRepositoryFileTreeConverter converter =
new JsonToRepositoryFileTreeConverter( response.getText() );
fileTree = converter.getTree();
String deletedFilesUrl = GWT.getHostPageBaseURL() + "api/repo/files/deleted?ts=" + System.currentTimeMillis();
RequestBuilder deletedFilesRequestBuilder = new RequestBuilder( RequestBuilder.GET, deletedFilesUrl );
deletedFilesRequestBuilder.setHeader( "Accept", "application/json" );
deletedFilesRequestBuilder.setHeader( "If-Modified-Since", "01 Jan 1970 00:00:00 GMT" );