如何知道quadpack使用的集成技术

I have been learning about QUADPACK and I used scipy.integrate.quad to calculate an integral from 0 to infinite. It gave a very good result, but now I want to know which integration method (QAGI, QAWF,etc.) the software has applied. Is there any way for printing the technique? Does the software apply some decision tree? Thanks in advance for your time. Regards.I have been learning about QUADPACK and I used