def has_base_type(self, type_=None):
raise Unimplemented()<EOL>
Tests if the given type is derived from a base type.

        arg:    type (osid.type.Type): a type
        return: (boolean) - true is the given type is derived from a
                base type, false otherwise
        raise:  NullArgument - type is null
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        compliance: mandatory - This method must be implemented.