anchor.diff:      }
   
       return _api;
  -}+}
  
positive.code:             'first_names': registrations.map((r)=>r.FirstName),
              'last_names': registrations.map((r)=>r.LastName),
              'emails': registrations.map((r)=>r.Email),
              'code': promoCode
          });
      }
  
  
negative.code:      */
      Future GetPromotionDetails(String code) {
          return Request('register/'+Event+'/promotion', 'GET', {
              'promo': code
          });
      }
  
  