ImmutableObjectBaseT Class

public abstract class ImmutableObjectBase<T> : IImmutableObject<T>, 
	IImmutableObject, ICloneable
where T : ImmutableObjectBase<T>

Public MustInherit Class ImmutableObjectBase(Of T As ImmutableObjectBase(Of T))
	Implements IImmutableObject(Of T), IImmutableObject, ICloneable

generic<typename T>
where T : ImmutableObjectBase<T>
public ref class ImmutableObjectBase abstract : IImmutableObject<T>, 
	IImmutableObject, ICloneable

[<AbstractClassAttribute>]
type ImmutableObjectBase<'T when 'T : ImmutableObjectBase<'T>> = 
    class
        interface IImmutableObject<'T>
        interface IImmutableObject
        interface ICloneable
    end

JavaScript does not support generic types or methods.