@file:OptIn(FreezingIsDeprecated::class, ObsoleteWorkersApi::class) import kotlinx.cinterop.* import kotlin.native.concurrent.* import objcTests.* fun Worker.runInWorker(block: () -> Unit) { block.freeze() val future = this.execute(TransferMode.SAFE, { block }) { it() } future.result // Throws on failure. } fun nsArrayOf(vararg elements: Any): NSArray = NSMutableArray().apply { elements.forEach { this.addObject(it as ObjCObject) } }