[DF] Invoke SetDirectory only on instances of TH1 and derived
[DF] Invoke SetDirectory only on instances of TH1 and derived

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