anchor.diff:        addressTableExists(pool).then((exists) {
           completer.complete(exists);
         });
  -    });
  +    }, onError: () => print("table resident_response exists"));
     });
   
     return completer.future;
  
positive.code: Future<bool> _tableExists(Pool pool, String tablename) {
    Completer<bool> completer = new Completer<bool>();
    var sql = "SELECT EXISTS(SELECT 1 FROM information_schema.tables "
        " WHERE table_catalog='gcanvas' AND"
        " table_schema='public' AND "
        " table_name='$tablename');";
  
  
negative.code:       addressTableExists(pool).then((exists) {
          completer.complete(exists);
        });
      }, onError: () => print("table question_script_response exists"));
    });
  
    return completer.future;
  