public String getExtendedRequestId() {
        return metadata.get(ResponseMetadata.AWS_EXTENDED_REQUEST_ID);
    }
@return The extended request ID if available. This is needed in addition to {@link #getRequestId()} to
troubleshoot requests with the S3 service team.
aws-java-sdk-s3control/src/main/java/com/amazonaws/services/s3control/S3ControlResponseMetadata.java