Tonia Tkachuk Thank you for your response.

Agree. !! is a force to not null type and it will through an NPE if the variable is null whereas ?. is a null check and it will proceed only if the value is not null.

Thank you for pointing this out in the post. I have changed it.

You can read about ?. and !! in details on the below link.

Safe calls(?.) vs Null checks(!!) in Kotlin