AddMemberToGroup.
        [Preview API] Add a member to a Group.
        :param str group_id: Id of the Group.
        :param str member_id: Id of the member to add.

def add_member_to_group(self, group_id, member_id):
        """AddMemberToGroup.
        [Preview API] Add a member to a Group.
        :param str group_id: Id of the Group.
        :param str member_id: Id of the member to add.
        """
        route_values = {}
        if group_id is not None:
            route_values['groupId'] = self._serialize.url('group_id', group_id, 'str')
        if member_id is not None:
            route_values['memberId'] = self._serialize.url('member_id', member_id, 'str')
        self._send(http_method='PUT',
                   location_id='45a36e53-5286-4518-aa72-2d29f7acc5d8',
                   version='5.0-preview.1',
                   route_values=route_values)