public sealed class Allow : Header, 
	ISIPCloneable<Allow>

Public NotInheritable Class Allow
	Inherits Header
	Implements ISIPCloneable(Of Allow)

public ref class Allow sealed : public Header, 
	ISIPCloneable<Allow^>

[<SealedAttribute>]
type Allow =  
    class
        inherit Header
        interface ISIPCloneable<Allow>
    end