public void setLoadingImage(String src) {
setLoadingHtml("<img src=\""+src+"\"/>");
}
private void displayError(Throwable caught) {
Feedback fb = new Feedback();
fb.showError(caught);
if(GWT.getUncaughtExceptionHandler() != null)
GWT.getUncaughtExceptionHandler().onUncaughtException(caught);
wrapper.setWidget(fb);
}