@abc.abstractmethod<EOL><INDENT>def get_repositories_by_asset(self, asset_id):<DEDENT>
return<EOL>
Gets the list of ``Repository`` objects mapped to an ``Asset``.

        :param asset_id: ``Id`` of an ``Asset``
        :type asset_id: ``osid.id.Id``
        :return: list of repositories
        :rtype: ``osid.repository.RepositoryList``
        :raise: ``NotFound`` -- ``asset_id`` is not found
        :raise: ``NullArgument`` -- ``asset_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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