Swift Protocol: property that is subclass of: someClass, instead of being of that class

Question

I'm trying to create a protocol that describes a property that is a subclass of a certain class instead of being of that class.

I would like to know if something like this is possible.

protocol {
   var prop : T where T: SomeClass { get set} // something like this
}

versus

protocol {
  var prop : SomeClass {get set}
}

Answer 1

Use associatedtype in your protocol definition

protocol pp {
    associatedtype T where T: SomeClass
    var prop : T  { get set} 
}