// N.B., deliberately force a compilation error if/when new fields are added.
let ImplItemRef { id, ident, ref kind, span: _, ref vis, ref defaultness } = *impl_item_ref;
visitor.visit_nested_impl_item(id);
// N.B., deliberately force a compilation error if/when new fields are added.
let ImplItemRef { id, ident, ref kind, span: _, ref vis, ref defaultness } = *impl_item_ref;
visitor.visit_nested_impl_item(id);