Why testOptions is marked unstable with @Incubating? Any action needed for warning?

Question

I see warning on top of testOptions. Is it important warning that I should take an action? Anyone knows?

build.gradle.kts:

   testOptions {
        animationsDisabled = true
        unitTests.apply {
            isReturnDefaultValues = true 
            isIncludeAndroidResources = true
        }
        execution = "ANDROIDX_TEST_ORCHESTRATOR"
    }

 testOptions {
        execution "ANDROIDX_TEST_ORCHESTRATOR"
        animationsDisabled true
        unitTests {
            includeAndroidResources = true
            returnDefaultValues = true 
        }
    }

I converted from groovy to kotlin. That's how I noticed the warning!