public SubscriptionImpl(PartitionedMultiSubject parent, ISubscription inner)
 {
     _parent = parent;
     _inner  = inner;
 }
 public ObservableImpl(PartitionedMultiSubject parent)
     : this(parent, null)
 {
 }
 private ObservableImpl(PartitionedMultiSubject parent, IList <TypeErasedKeyBinding <T> > bindings)
     : base(bindings)
 {
     _parent = parent;
 }
 public ToTypedMultiSubject(PartitionedMultiSubject innerSubject) => _innerSubject = innerSubject;