How to disable this annoying message?

w: ATTENTION!
This build uses unsafe internal compiler arguments:

-XXLanguage:+InlineClasses

Start to happen after adding this:

freeCompilerArgs += [
                    "-XXLanguage:+InlineClasses"
            ]

I saw some issue where suggested to make those unsafe warnings configurable, but could find it on tracker

Found it https://youtrack.jetbrains.com/issue/KT-24770

That's our (shameful) tech debt. We've scheduled it for 1.3.50