Dart, constraints on Generics?
You can specify type constraints like this :
class StackPanel<TBase extends SomeType> extends Panel<TBase> {}The language specification says :
A type parameter
Tmay be suffixed with anextendsclause that specifies the upper bound forT. If no extends clause is present, the upper bound isObject. It is a static type warning if a type parameter is a supertype of its upper bound. The bounds of type variables are a form of type annotation and have no effect on execution in production mode.