{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
                    let ty = P(rustc_ast::Ty { kind, id: ty.id, span: ty.span, tokens: None });
                    let kind = TyKind::Array(ty.clone(), anon_const);
                    d_decl.output = FnRetTy::Ty(ty);