docs: def alias_repository(self, repository_id, alias_id):
          """Adds an ``Id`` to a ``Repository`` for the purpose of creating compatibility.
  
          The primary ``Id`` of the ``Repository`` is determined by the
          provider. The new ``Id`` is an alias to the primary ``Id``. If
          the alias is a pointer to another repository, it is reassigned
          to the given repository ``Id``.
  
          arg:    repository_id (osid.id.Id): the ``Id`` of a
                  ``Repository``
          arg:    alias_id (osid.id.Id): the alias ``Id``
          raise:  AlreadyExists - ``alias_id`` is in use as a primary
                  ``Id``
          raise:  NotFound - ``repository_id`` not found
          raise:  NullArgument - ``repository_id`` or ``alias_id`` is
                  ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for
          # osid.resource.BinLookupSession.alias_bin_template
          if self._catalog_session is not None:
              return self._catalog_session.alias_catalog(catalog_id=repository_id, alias_id=alias_id)
          self._alias_id(primary_id=repository_id, equivalent_id=alias_id)