What does /processwire/module/?reset=1 do?

[FrancisChung]

Hi,
I was wondering if anyone knew what this did? 

If so, do you know what modules it actually impacts? Is there another log that lists the action it took?

I'm having some weird problems with PHP duplicate declaration per link below, since this module was run.
 

 

[adrian]

Here's the code block:

https://github.com/processwire/processwire/blob/57b297fd1d828961b20ef29782012f75957d6886/wire/modules/Process/ProcessModule/ProcessModule.module#L309-L327

In case you don't know, it is called when you do a Modules > Refresh