[DF] Make CheckForDefinition refer to Vary as well as Redefine
[DF] Make CheckForDefinition refer to Vary as well as Redefine

Both methods need to check the definition of the column.

olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root