code: def create_group(self, group):
          
          data = group.to_json()
          response = self._do_request('POST', '/v2/groups', data=data)
          return response.json()
docs: Create and start a group.
  
          :param :class:`marathon.models.group.MarathonGroup` group: the group to create
  
          :returns: success
          :rtype: dict containing the version ID