[An extra null pointer check is not needed in functions](https://isocpp.org/wiki/faq/freestore-mgmt#delete-handles-null "Do I need to check for null before delete p?") like the following. - [JsonStr](https://github.com/anyRTC-UseCase/SipRtcProxy/blob/694e512d233c0888ea0dd328706c9a6ae4d57b2f/include/rapidjson/json_str.h#L16 "Destructor for JsonStr") - [RtcCall](https://github.com/anyRTC-UseCase/SipRtcProxy/blob/a325057414b92dc07a3c1f99c2a9b851963c02be/src/RtcCall.cpp#L34 "Destructor for RtcCall")