I made the function per instance instead of per package. Per package is more powerful because you can directly compare multiple instances of package with each other, but it results in a more complicated API and I couldn't think of an actual use case for it.
Fixes #11.
I made the function per instance instead of per package. Per package is more powerful because you can directly compare multiple instances of package with each other, but it results in a more complicated API and I couldn't think of an actual use case for it.