@abc.abstractmethod<EOL><INDENT>def make_equivalent(self, primary_type, equivalent_type):<DEDENT>
pass<EOL>
Makes two ``Types`` equivalent.

        Calls to ``TypeLookupSession.getType(equivalentType)`` return
        the ``primaryType``.

        :param primary_type: the primary ``Type``
        :type primary_type: ``osid.type.Type``
        :param equivalent_type: a ``Type`` to be made equivalent
        :type equivalent_type: ``osid.type.Type``
        :raise: ``NotFound`` -- ``primary_type`` or ``equivalent_type`` is not found
        :raise: ``NullArgument`` -- ``primary_type`` or ``equivalent_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*