code: public String getSuperTypeBinding()
      {
          InterfaceType superType = _controlIntf.getSuperType();
          if (superType != null)
          {
              String typeStr = superType.toString();
              int paramIndex = typeStr.indexOf('<');
              if (paramIndex > 0)
                  return typeStr.substring(paramIndex);
          }
          return "";
      }
docs: Returns any formal type parameters that should be bound for the bean's superclass,
  based upon any type bindings that occur on the original interface.