{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"Some(kind"}]}
                    Some(kind @ (ty::ClosureKind::Fn | ty::ClosureKind::FnMut)) => kind,
                let closure_kind = match closure_kind_ty.to_opt_closure_kind() {
                    Some(ty::ClosureKind::FnOnce) => {