@Override
    public DownloadDBLogFilePortionResult downloadDBLogFilePortion(DownloadDBLogFilePortionRequest request) {
        request = beforeClientExecution(request);
        return executeDownloadDBLogFilePortion(request);
    }
<p>
Downloads all or a portion of the specified log file, up to 1 MB in size.
</p>
<p>
This command doesn't apply to RDS Custom.
</p>

@param downloadDBLogFilePortionRequest
@return Result of the DownloadDBLogFilePortion operation returned by the service.
@throws DBInstanceNotFoundException
        <code>DBInstanceIdentifier</code> doesn't refer to an existing DB instance.
@throws DBLogFileNotFoundException
        <code>LogFileName</code> doesn't refer to an existing DB log file.
@sample AmazonRDS.DownloadDBLogFilePortion
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/DownloadDBLogFilePortion" target="_top">AWS
     API Documentation</a>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/AmazonRDSClient.java