We've been using an old mogenerator and just tried 1.16. I notice that it's still not forward declaring classes that are specified for transformable-type attributes using attributeValueClassName.

In our custom templates, we added this to solve the problem:

<$foreach Attribute noninheritedAttributes do$><$if Attribute.hasTransformableAttributeType$>@Class <$Attribute.objectAttributeType$>;<$endif$>

Could it be added?