{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"decoder.interner().mk_offset_of_from_iter("}]}
        decoder.interner().mk_offset_of_from_iter(
        let len = decoder.read_usize();
            (0..len).map::<(VariantIdx, FieldIdx), _>(|_| Decodable::decode(decoder)),