OptionalHAlignmentUnaryFunction
class OptionalHAlignmentUnaryFunction<A, OA : ObservableValue<A>>(argA: OA, lambda: (A) -> HAlignment?) : UnaryFunction<HAlignment?, A, OA> , ObservableOptionalHAlignment
Boilerplate which avoids having to use generics.
Similar to HAlignmentUnaryFunction, but the value can also be null.