[tbuffer] declare TBufferJSON is final class, including all its methods
[tbuffer] declare TBufferJSON is final class, including all its methods

Clarify inherited functions roles
karies/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,karies/root,karies/root,karies/root,karies/root,karies/root,karies/root,karies/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,olifre/root,root-mirror/root,olifre/root,karies/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,root-mirror/root