The code of ETF Trick is empty

[MbProg]

Hello,
I tried to analyze your code for the ETF Trick, but your class is only consisting out of empty functions contain pass. Why is it like that?

[HsergeyF]

Hi, @MbProg !

I suppose you should purchase an api key to get an access to the code, because this lib is not free.
Check: https://hudsonthames.org/mlfinlab/