9     Both(A, B),  enumerator
54             Left(left) | Both(left, _) => Some(left),  in left()
62             Right(right) | Both(_, right) => Some(right),  in right()
70             Both(a, b) => Some((a, b)),  in both()
80             Both(ref left, ref right) => Both(left, right),  in as_ref()
89             Both(ref mut left, ref mut right) => Both(left, right),  in as_mut()
98             Both(a, b) => Both(b, a),  in flip()
109             Both(a, b) => Both(f(a), b),  in map_left()
124             Both(a, b) => Both(a, f(b)),  in map_right()
139             Both(a, b) => Both(f(a), g(b)),  in map_any()
150             Left(a) | Both(a, _) => f(a),  in left_and_then()
163             Right(b) | Both(_, b) => f(b),  in right_and_then()
177             Both(a, b) => f(a, b),  in reduce()