> ast[0].statements[0].identifier.type
Identifier { identifier: ScopeItem { id: 'A<T>', original: null } }

                       Generic {
                         parentScope: null,
                         parentNode: null,
                         queueQualifier: null,
                         type: { value: ',' },
                         parameters: { value: '<' } } ] } ],

let a: A<T<U, V>, W<X, Y>>

vsl:parser> a?
[ undefined ]

class Optional<T> {
     var isNil: Bool { get }
     var value: T { get }
}