@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getItem() != null)
            sb.append("Item: ").append(getItem()).append(",");
        if (getTableName() != null)
            sb.append("TableName: ").append(getTableName()).append(",");
        if (getConditionExpression() != null)
            sb.append("ConditionExpression: ").append(getConditionExpression()).append(",");
        if (getExpressionAttributeNames() != null)
            sb.append("ExpressionAttributeNames: ").append(getExpressionAttributeNames()).append(",");
        if (getExpressionAttributeValues() != null)
            sb.append("ExpressionAttributeValues: ").append(getExpressionAttributeValues()).append(",");
        if (getReturnValuesOnConditionCheckFailure() != null)
            sb.append("ReturnValuesOnConditionCheckFailure: ").append(getReturnValuesOnConditionCheckFailure());
        sb.append("}");
        return sb.toString();
    }
Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be
redacted from this string using a placeholder value.

@return A string representation of this object.

@see java.lang.Object#toString()
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/model/Put.java