To be fair having a name can make things easier to read. I get that i % 2 == 0 is a common pattern and most programmers will quickly recognize what is happening. But isEven(i) is just that much easier to grok and leaves that brainpower to work on something else.

But I would never import a package for it. I would just create a local helper for something this trivial.

Also there are 40-something packages depending on it, so I guess it gets pulled automatically when they are used.

If youre lazy/busy enough, doing basic checks on the input is enough boilerplate to package out.