isKotlinRuntime

The kotlin RUNTIME namespace that SHARE_ALL delegates to the parent and SPLIT redirects to the game: the stdlib + reflect, NOT the compiler (org.jetbrains.kotlin.*, always masking-owned). Excludes the scripting API (kotlin.script.*) and kotlin-metadata-jvm (kotlin.metadata.*) — the game ships neither, so delegating or redirecting them would hit a loader that lacks them. They stay masking-owned via the normal child-first path.