[DF] Add HasColumn mehos to check if a column is available in the data frame
[DF] Add HasColumn mehos to check if a column is available in the data frame

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