Groovy-friendly macro parameter annotations

In Groovy, we're used to define "properties" like so:

class MyParams {
    @PropertyMandatory
    String name
}

It generates a private field, a getter, and a setter.
But Groovy "puts" the annotation on the private field.
And the macro parameters and their annotations (like @PropertyMandatory) only work on setters and public fields.
So in Groovy, the @PropertyMandatory annotation was simply ignored.

It would be nice if such situations were handled so that idiomatic Groovy can be used.

Remark: suffice to add the public keyword to create a public field, so it's an okay workaround.