[DF][NFC] Make RColumnValue methods inline
[DF][NFC] Make RColumnValue methods inline

...now that declaration order makes it possible

root-mirror/root,olifre/root,karies/root,olifre/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,karies/root,karies/root,karies/root,root-mirror/root,karies/root,olifre/root,karies/root,karies/root,olifre/root,karies/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root