A closed union type.

no type hierarchy

- `UnionType`
  - `Type`

no subtypes hierarchy

Attributes
`caseTypes` | Source Code `shared formal List<Type<Anything>> caseTypes` The list of closed case types of this union.

Inherited Attributes
Attributes inherited from: `Object` `hash`, `string`

Inherited Methods
Methods inherited from: `Object` `equals()`
Methods inherited from: `Type<Target>` `exactly()`, `intersection()`, `subtypeOf()`, `supertypeOf()`, `typeOf()`, `union()`