@abc.abstractmethod<EOL><INDENT>def remove_children(self, id_):<DEDENT>
pass<EOL>
Removes all childrenfrom an ``Id``.

        :param id: the ``Id`` of the node
        :type id: ``osid.id.Id``
        :raise: ``NotFound`` -- an node identified by the given ``Id`` was not found
        :raise: ``NullArgument`` -- ``id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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