code: def hit_extend(self, hit_id, assignments, minutes):
          
  
          assert type(hit_id) is list
          assert type(hit_id[0]) is str
  
          if self.amt_services.extend_hit(hit_id[0], assignments, minutes):
              print "HIT extended."
docs: Add additional worker assignments or minutes to a HIT.
  
          Args:
              hit_id: A list conaining one hit_id string.
              assignments: Variable <int> for number of assignments to add.
              minutes: Variable <int> for number of minutes to add.
  
          Returns:
              A side effect of this function is that the state of a HIT changes
              on AMT servers.
  
          Raises: