@abc.abstractmethod<EOL><INDENT>def get_installation_content_ids(self):<DEDENT>
return<EOL>
Gets the installation content ``Ids``.

        :return: the installation content ``Ids``
        :rtype: ``osid.id.IdList``
        :raise: ``OperationFailed`` -- unable to complete request

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