Github user jburwell commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/1618#discussion_r74315902
  
    --- Diff: server/src/com/cloud/api/ApiResponseHelper.java ---
    @@ -479,6 +479,17 @@ public SnapshotResponse 
createSnapshotResponse(Snapshot snapshot) {
                 if (zone != null) {
                     snapshotResponse.setZoneId(zone.getUuid());
                 }
    +
    +            if (volume.getVolumeType().equals(Volume.Type.ROOT)) {
    --- End diff --
    
    Enumerated values are guaranteed to be singletons.   Therefore, the ``==`` 
operator deterministically performs both reference and value equality checks.  
It is also preferred because it avoid an NPE in the event that 
``volume.getVolumeType()`` returns null.


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