@abc.abstractmethod<EOL><INDENT>def get_depot_form_for_update(self, depot_id):<DEDENT>
return<EOL>
Gets the depot form for updating an existing depot.

        A new depot form should be requested for each update
        transaction.

        :param depot_id: the ``Id`` of the ``Depot``
        :type depot_id: ``osid.id.Id``
        :return: the depot form
        :rtype: ``osid.installation.DepotForm``
        :raise: ``NotFound`` -- ``depot_id`` is not found
        :raise: ``NullArgument`` -- ``depot_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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