ICartItemCollectionT Interface

public interface ICartItemCollection<out T> : IReadOnlyCollection<T>, 
	IEnumerable<T>, IEnumerable
where T : ICartItemIdentity

Public Interface ICartItemCollection(Of Out T As ICartItemIdentity)
	Inherits IReadOnlyCollection(Of T), IEnumerable(Of T), IEnumerable

generic<typename T>
where T : ICartItemIdentity
public interface class ICartItemCollection : IReadOnlyCollection<T>, 
	IEnumerable<T>, IEnumerable

type ICartItemCollection<'T when 'T : ICartItemIdentity> = 
    interface
        interface IReadOnlyCollection<'T>
        interface IEnumerable<'T>
        interface IEnumerable
    end