The difference between a sum type and a union type is that for a sum type, you can have multiple variants of the same type. That is, `int + int` is a different type from `int`. Since `int or int` is the same type as `int`, it's not a sum type, but a union type.
- mixed bag seq: allow strings and int in a seq masiarek2
- mixed bag seq: allow strings and int in a seq juancarlospaco
- mixed bag seq: allow strings and int in a seq PMunch
- mixed bag seq: allow strings and int in a seq Zoom
- mixed bag seq: allow strings and int in a ... ElegantBeef
- mixed bag seq: allow strings and int ... xigoi
- mixed bag seq: allow strings and ... ElegantBeef
- mixed bag seq: allow strings ... xigoi
