hi i am not able to understnd the meaning of

Part.FeatureExtrusion2(Sd, Flip, Dir, T1, T2, D1, D2, Dchk1, Dchk2, Ddir1, Ddir2, Dang1, Dang2, OffsetReverse1, OffsetReverse2, Merge).

What is Sd,Flip etc please explain in detail