Actual arbitrary monkeypatching for Go. Yes really.

Read this blogpost for an explanation on how it works: https://bou.ke/blog/monkey-patching-in-go/

It's not possible through regular language constructs, but we can always bend computers to our will! Monkey implements monkeypatching by rewriting the running executable at runtime and inserting a jump to the function you want called instead. This is as unsafe as it sounds and I don't recommend anyone do it outside of a testing environment.

Make sure you read the notes at the bottom of the READ