final String name = NamingUtils.lowerFirst(NamingUtils
.getMethodShortName(_method.getName()));
final Annotation[] annotations = _method.getDeclaredAnnotations();
for (final Annotation annotation : annotations) {
final Constraint constraint = (Constraint) annotation;
if (constraint.required() && msg.get(name) == null) {
if (missing.length() > 0) {
missing.append(", ");
}
missing.append(name);
}