class ElementHelperBase {
  public:
  virtual Element* get() = 0;
  virtual void Edit() = 0;
}

template<class ElementType>
class ElementHelper : public ElementHelperBase
{
  private:
  ElementType& element;  // initialized by some constructor

  public:
  virtual Element* get() { return &element; }
  virtual void Edit() { EditElement(element); }
}

// using function overloading
// you can add an 'EditElement()' function for each type

void EditElement(ElementA& element)
{
  ElementAEditor editor;
  ... do you're stuff
}

void EditElement(ElementB& element)
{
  ElementBEditor editor;
  ... do you're stuff
}

void EditElement(ElementHelperBase& e)
{
  e.Edit();
}