Thanks for all the feedback!! As Sling GitHub repository is readonly so a regular pull request would not work. I have created SLING-2463 [1] and attached the implementation as a patch. Kindly have a look at that.
Let me know if any other change is required from my side for this feature to be included in Sling Chetan Mehrotra [1] https://issues.apache.org/jira/browse/SLING-2463
