def oldNullability = hasNullableAnnotation(oldField)
            def newNullability = hasNullableAnnotation(newField)

            if (Modifier.isFinal(oldField.modifiers) && Modifier.isFinal(newField.modifiers)) {
                if (!oldNullability && newNullability) {
                    errors << "From non-nullable to nullable breaking change"

    @Override
    public void visit(FieldDeclaration fieldDeclaration, ClassMetaDataRepository<ClassMetaData> arg) {
        boolean isConst = getCurrentClass().isInterface() || (fieldDeclaration.isStatic() && fieldDeclaration.isFinal());
        if (isConst) {
            fieldDeclaration.getVariables().forEach(variableDeclarator -> {
                String constName = variableDeclarator.getNameAsString();