{"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"let"}]}
        let NameBindingKind::Res(Res::Def(
    fn ctor_fields_span(&self, binding: NameBinding<'_>) -> Option<Span> {
            DefKind::Ctor(CtorOf::Struct, CtorKind::Fn),