{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":".map(|decl|"}]}
                    .map(|decl| (decl.output.span(), Cow::from("return type in trait"), false)),
                    .and_then(|node| node.fn_decl())
                Some(param_env.and(infer::ValuePairs::Terms(ExpectedFound {