GetWorkItemNextStatesOnCheckinAction.
        [Preview API] Returns the next state on the given work item IDs.
        :param [int] ids: list of work item ids
        :param str action: possible actions. Currently only supports checkin
        :rtype: [WorkItemNextStateOnTransition]

def get_work_item_next_states_on_checkin_action(self, ids, action=None):
        """GetWorkItemNextStatesOnCheckinAction.
        [Preview API] Returns the next state on the given work item IDs.
        :param [int] ids: list of work item ids
        :param str action: possible actions. Currently only supports checkin
        :rtype: [WorkItemNextStateOnTransition]
        """
        query_parameters = {}
        if ids is not None:
            ids = ",".join(map(str, ids))
            query_parameters['ids'] = self._serialize.query('ids', ids, 'str')
        if action is not None:
            query_parameters['action'] = self._serialize.query('action', action, 'str')
        response = self._send(http_method='GET',
                              location_id='afae844b-e2f6-44c2-8053-17b3bb936a40',
                              version='5.1-preview.1',
                              query_parameters=query_parameters)
        return self._deserialize('[WorkItemNextStateOnTransition]', self._unwrap_collection(response))