anchor.diff:      var firstRepliedDocument = replyMessage.documents[0];
       var errorMessage = "";
       if (replyMessage.documents.isEmpty) {
  -      errorMessage = "Error executing Db command, documents are empty $replyMessage";
  +      errorMessage =
  +          "Error executing Db command, documents are empty $replyMessage";
         print("Error: $errorMessage");
         var m = new Map();
  -      m["errmsg"]=errorMessage;
  +      m["errmsg"] = errorMessage;
         result.completeError(m);
  -    } else if (firstRepliedDocument['ok'] == 1.0 && firstRepliedDocument['err'] == null) {
  +    } else if (firstRepliedDocument['ok'] == 1.0 &&
  +        firstRepliedDocument['err'] == null) {
         result.complete(firstRepliedDocument);
       } else {
         result.completeError(firstRepliedDocument);
  
positive.code:     });
    }
  
    Future executeDbCommand(MongoMessage message, {_Connection connection}) async {
      if (connection == null) {
        connection = _masterConnection;
      }
  
negative.code:     } else if (v == MongoDbCRAuthenticator.name) {
        _authenticationScheme = AuthenticationScheme.MONGODB_CR;
      } else {
        throw new MongoDartError(
            "Provided authentication scheme is not supported : $v");
      }
    }
  
  