@abc.abstractmethod<EOL><INDENT>def get_installation_update_session_for_site(self, site_id):<DEDENT>
return<EOL>
Gets the ``OsidSession`` associated with the installation update service for the given site.

        :param site_id: the ``Id`` of the site
        :type site_id: ``osid.id.Id``
        :return: ``an _installation_update_session``
        :rtype: ``osid.installation.InstallationUpdateSession``
        :raise: ``NotFound`` -- ``site_id`` not found
        :raise: ``NullArgument`` -- ``site_id`` is ``null``
        :raise: ``OperationFailed`` -- ``unable to complete request``
        :raise: ``Unimplemented`` -- ``supports_installation_update()`` or ``supports_visible_federation()`` is
        ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_installation_update()`` and
        ``supports_visible_federation()`` are ``true``.*