{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"//"}]}
                // Region of return type and arguments checked to be the same earlier.
            AnnotatedBorrowFnSignature::NamedFunction { arguments, return_ty, return_span } => {
                let region_name = cx.get_region_name_for_ty(*return_ty, 0);