docs: public static void setFieldOnSuper(Object messageArgument, Class senderClass, Object receiver, String messageName) throws Throwable {
          try {
              if (receiver instanceof Class) {
                  InvokerHelper.setAttribute(receiver, messageName, messageArgument);
              } else {
                  MetaClass mc = ((GroovyObject) receiver).getMetaClass();
                  mc.setAttribute(senderClass, receiver, messageName, messageArgument, true, true);
              }
          } catch (GroovyRuntimeException gre) {
              throw unwrap(gre);
          }
      }