{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"Some(fields.iter_enumerated().filter_map(|(field,"}]}
        Some(fields.iter_enumerated().filter_map(|(field, &opt_ty_local)| {
        let fields = self.fragments[local].as_ref()?;
            let (ty, local) = opt_ty_local?;