docs: public TransactionWriteRequest addConditionCheck(Object key,
                                                       DynamoDBTransactionWriteExpression transactionWriteExpression,
                                                       ReturnValuesOnConditionCheckFailure returnValuesOnConditionCheckFailure) {
          transactionWriteOperations.add(new TransactionWriteOperation(key, TransactionWriteOperationType.ConditionCheck, transactionWriteExpression, returnValuesOnConditionCheckFailure));
          return this;
      }