{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"Rvalue::CheckedBinaryOp(_,"}]}
                        Rvalue::CheckedBinaryOp(_, o1, o2) => {
                        | Rvalue::UnaryOp(_, o) => record_usage_for_operand(o, &mut result),
                            for o in [o1, o2] {