{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"byte_string:"}]}
                byte_string: actual_literal.and_then(|i| {
            reason: AttributeParseErrorReason::ExpectedStringLiteral {
                    i.kind.is_bytestr().then(|| self.sess().source_map().start_point(i.span))