How to access InSAR Stack Overview in python using esa_snappy module

I have been trying multiple ways to access the InSAR Stack Overview in esa_snappy module in python.

Tried these 3 names in createProduct.

I have also tried to use the method mentioned in INSAR / DINSAR - Perpendicular baseline calculation - #34 by fvan

But it doesn’t work out, This was the error returned:

I would appreciate if someone could help me out or if there exists a simpler way to calculate perpendicular baseline please let me know.

Thanks in Advance!!