public void setGroupFiles(String groupFiles) {
        this.groupFiles = groupFiles;
    }
<p>
Grouping files is turned on by default when the input contains more than 50,000 files. To turn on grouping with
fewer than 50,000 files, set this parameter to "inPartition". To disable grouping when there are more than 50,000
files, set this parameter to <code>"none"</code>.
</p>

@param groupFiles
       Grouping files is turned on by default when the input contains more than 50,000 files. To turn on grouping
       with fewer than 50,000 files, set this parameter to "inPartition". To disable grouping when there are more
       than 50,000 files, set this parameter to <code>"none"</code>.
aws-java-sdk-glue/src/main/java/com/amazonaws/services/glue/model/S3JsonSource.java