@abc.abstractmethod<EOL><INDENT>def get_log_form_for_update(self, log_id):<DEDENT>
return<EOL>
Gets the log form for updating an existing log.

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

        :param log_id: the ``Id`` of the ``Log``
        :type log_id: ``osid.id.Id``
        :return: the log form
        :rtype: ``osid.logging.LogForm``
        :raise: ``NotFound`` -- ``log_id`` is not found
        :raise: ``NullArgument`` -- ``log_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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