code: def change_hit_type_of_hit(self, hit_id, hit_type):
          
          params = {'HITId' : hit_id,
                    'HITTypeId': hit_type}
  
          return self._process_request('ChangeHITTypeOfHIT', params)
docs: Change the HIT type of an existing HIT. Note that the reward associated
          with the new HIT type must match the reward of the current HIT type in
          order for the operation to be valid.
          
          :type hit_id: str
          :type hit_type: str