public void setGroupSize(String groupSize) {
        this.groupSize = groupSize;
    }
<p>
The target group size in bytes. The default is computed based on the input data size and the size of your
cluster. When there are fewer than 50,000 input files, <code>"groupFiles"</code> must be set to
<code>"inPartition"</code> for this to take effect.
</p>

@param groupSize
       The target group size in bytes. The default is computed based on the input data size and the size of your
       cluster. When there are fewer than 50,000 input files, <code>"groupFiles"</code> must be set to
       <code>"inPartition"</code> for this to take effect.
aws-java-sdk-glue/src/main/java/com/amazonaws/services/glue/model/S3JsonSource.java