@abc.abstractmethod<EOL><INDENT>def unassign_package_from_depot(self, package_id, depot_id):<DEDENT>
pass<EOL>
Removes a ``Package`` from a ``Depot``.

        :param package_id: the ``Id`` of the ``Package``
        :type package_id: ``osid.id.Id``
        :param depot_id: the ``Id`` of the ``Depot``
        :type depot_id: ``osid.id.Id``
        :raise: ``NotFound`` -- ``package_id`` or ``depot_id`` not found or ``package_id`` not assigned to ``depot_id``
        :raise: ``NullArgument`` -- ``package_id`` or ``depot_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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