public class Variable<T> : Variable, IModelExpression<T>, 
	IModelExpression, SettableTo<Variable<T>>, ICloneable, HasObservedValue

public class Variable<T> : Variable, IModelExpression<T>, 
	IModelExpression, SettableTo<Variable<T>>, ICloneable, HasObservedValue

type Variable<'T> =  
    class 
        inherit Variable 
        interface IModelExpression<'T>
        interface IModelExpression 
        interface SettableTo<Variable<'T>>
        interface ICloneable 
        interface HasObservedValue 
    end

type Variable<'T> =  
    class 
        inherit Variable 
        interface IModelExpression<'T>
        interface IModelExpression 
        interface SettableTo<Variable<'T>>
        interface ICloneable 
        interface HasObservedValue 
    end

generic<typename T>
public ref class Variable : public Variable, 
	IModelExpression<T>, IModelExpression, SettableTo<Variable<T>^>, ICloneable, 
	HasObservedValue

generic<typename T>
public ref class Variable : public Variable, 
	IModelExpression<T>, IModelExpression, SettableTo<Variable<T>^>, ICloneable, 
	HasObservedValue

Public Class Variable(Of T) _
	Inherits Variable _
	Implements IModelExpression(Of T), IModelExpression, SettableTo(Of Variable(Of T)),  _
	ICloneable, HasObservedValue

Public Class Variable(Of T) _
	Inherits Variable _
	Implements IModelExpression(Of T), IModelExpression, SettableTo(Of Variable(Of T)),  _
	ICloneable, HasObservedValue