Let's strongly recommend avoid using atomicfu for public API (public & protected)

[bashor]

At least by changing this section: https://github.com/kotlin/kotlinx.atomicfu#dos-and-donts

The best solution is adding a check, see #119

[elizarov]

We do actually have a test in kotlinx.coroutines that makes sure no atomic even leaks outside of the module.

[mvicsokolova]

Here is the related issue: #119