@Override
      boolean isNullable(Invokable<?, ?> invokable) {
        return FROM_DECLARATION_ANNOTATIONS_ONLY.isNullable(invokable)
            || containsNullable(invokable.getAnnotatedReturnType().getAnnotations());
        // TODO(cpovirk): Should we also check isNullableTypeVariable?
      }

      @Override
      boolean isNullable(Parameter param) {