// "https://vaadin.com/download/prerelease/7.0/7.0.0/7.0.0.beta1/vaadin-all-7.0.0.beta1.zip");
// addComponents(resource, components);
// resource = new ExternalResource(
// "https://vaadin.com/download/book-of-vaadin/current/pdf/book-of-vaadin.pdf");
// addComponents(resource, components);
ConnectorResource resource;
resource = new StreamResource(new StreamResource.StreamSource() {
@Override
public InputStream getStream() {
try {