anchor.diff:        database = new Map();
         this.test = true;
       } else {
  -      database = ae.context.services.db;
         this.test = false;
       }
     }
  
positive.code:         //TODO: Implement delete
        }
      } else {
        database.commit(inserts: inserts, deletes: deletes);
      }
      return new Future.value(null);
    }
  
negative.code:         }
        }
      } else {
        var query = ae.context.services.db.query(dbClass)..filter(attribute, value);
        result = await query.run().toList();
      }
      return new Future.value(result);
  