AfterTest snapshots the currently-running goroutines and returns a function to be run at the end of tests to see whether any goroutines leaked.

AssertNoGoroutineLeak checks and ensures that there is no extra goroutine other than the ones included in the init map.

from https://github.com/petermattis/goid/blob/master/goid.go.

GetInterestedGoroutines returns a set of interested goroutines.