Why is the foreignIdFor() method checking if the model's key is incrementing?

[sikhlana]

I've created a sub-system of sorts for a project which fetches and caches user information from the main system's database.

The TL;DR is that the model's $incrementing property is set to false. And because of that the migration related to that model created a UUID column instead of BIGINT.

My question is: Shouldn't the foreignIdFor() method inside the Blueprint object should only check if the keyType is int or not?