static Class typeToClass(Type type) {
  if (type == null) null;
  if (type cast Class) ret type;
  if (type cast ParameterizedType) ret optCast Class(type.getRawType());
  if (type cast GenericArrayType)
    ret typeToClass(type.getGenericComponentType()).arrayType();
  if (type cast IResolvableClass)
    ret type.resolveToClass();
  null;
}