{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
        // apply the generated code on each element in the `Vec` or `Option`.
        // Abstract over `Vec<T>` and `Option<T>` fields using `FieldInnerTy`, which will
        let inner_ty = FieldInnerTy::from_type(&ast.ty);