@abc.abstractmethod<EOL><INDENT>def get_assignable_depot_ids_for_package(self, depot_id, package_id):<DEDENT>
return<EOL>
Gets a list of depot including and under the given depot node in which a specific package can be assigned.

        :param depot_id: the ``Id`` of the ``Depot``
        :type depot_id: ``osid.id.Id``
        :param package_id: the ``Id`` of the ``Package``
        :type package_id: ``osid.id.Id``
        :return: list of assignable depot ``Ids``
        :rtype: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``depot_id`` or ``package_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request

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