Hi @shabir.ahmed, It’s a bit of a fudge, but I managed to achieve it by creating 2 dummy datasources where the value for ‘Cons’ was zero for all instances and then creating them as the first and last series:
When doing this make sure the dummy series have their tooltips disabled and the column fill & stroke width & opacity set to zero.
Also note that you can’t really control the gap between the groups 
Let me know if you need further guidance.