Should we have a code check for ObjectHelper.requireNonNull on a primitive?

[jnlopar]

I found a couple small instances of ObjectHelper.requireNonNull being used on primitive ints, which I patched in #6012 . Does the Rx codebase have a code pattern checking framework that we could augment to find other potential instances of this that could be causing unnecessary boxing? Errorprone, for example, has this check: https://errorprone.info/bugpattern/PreconditionsCheckNotNullPrimitive for a similar pattern on Guava's Preconditions.checkNotNull, so having one for ObjectHelper could be potentially useful here.

[akarnokd]

You could create trap overloads that always throw then see if something does crash or shows up as dependency on that method.