@utilities.arguments_not_none<EOL><INDENT>def remove_children(self, id_):<DEDENT>
results = self._rls.get_relationships_by_genus_type_for_source(id_, self._relationship_type)<EOL>if results.available() == <NUM_LIT:0>:<EOL><INDENT>raise errors.NotFound()<EOL><DEDENT>for r in results:<EOL><INDENT>self._ras.delete_relationship(r.get_id())<EOL><DEDENT>
Removes all childrenfrom an ``Id``.

        arg:    id (osid.id.Id): the ``Id`` of the node
        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.*