public void buttonClick(ClickEvent event) {
boolean readOnly = form.isReadOnly();
if (readOnly) {
bio.setReadOnly(false);
form.setReadOnly(false);
form.removeStyleName("light");
event.getButton().setCaption("Save");
event.getButton().addStyleName("primary");
} else {
bio.setReadOnly(true);
form.setReadOnly(true);