[DF] Deprecate GetDataBlockCallback instead of removing it
[DF] Deprecate GetDataBlockCallback instead of removing it

GetSampleCallback is the superior alternative.

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