How to find out the name of the previous command in a script?

Question

linux

There is a special bash variable "$_" which contains the last argument of the previous command. But how to get the whole previous command in a script?
for example:

#!/usr/bin/env zsh

fn() {
    pre_command=...
    echo $pre_command   # выводит "date -I"
}

date -I
fn

Answer 1

Didn't check but!! works? Or 2.
upd: problem solution below

Answer 2

MB through history pull out. So offhand said.

Answer 3

superuser.com/questions/453363/return-last-command...
Not helping?