PRE_PACKAGE_UNINSTALL is never fired

[SebCorbin]

Problem
Willing to contribute to https://github.com/cweagans/composer-patches and https://github.com/derhasi/composer-preserve-paths, I discovered that PackageEvents::PRE_PACKAGE_UNINSTALL is documented but never used

Question
So I'm wondering if it should be dispatched by composer itself on $this->composer->getInstallationManager()->uninstall() or by the module calling this?

[alcohol]

This is either a bug, or it was simply never implemented. Either way, a pull request is welcome :-).

[SebCorbin]

So my bad, this morning I dug up in the code and it seems implemented here https://github.com/composer/composer/blob/master/src/Composer/Installer.php#L572 bu the thing is, the number of arguments to reproduce this is too damn high :)

I tried a hotfix for the patch plugin here SebCorbin/composer-patches@1cb9bac and it is ugly
I don't want to break the API so I'm not gonna write a pull request, and now that I've found why I'm frustrated feel free to close this issue