@abc.abstractmethod<EOL><INDENT>def get_installation_notification_session(self, installation_receiver, proxy):<DEDENT>
return<EOL>
Gets the notification session for notifications pertaining to installation changes.

        :param installation_receiver: the installation receiver
        :type installation_receiver: ``osid.installation.InstallationReceiver``
        :param proxy: a proxy
        :type proxy: ``osid.proxy.Proxy``
        :return: an ``InstallationNotificationSession``
        :rtype: ``osid.installation.InstallationNotificationSession``
        :raise: ``NullArgument`` -- ``installation_receiver`` or ``proxy`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_installation_notification()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_installation_notification()`` is ``true``.*