Function tickUnref

test/parallel/test-worker-message-port-transfer-closed.js:52–55

(n, fn)

testBothClosed();

function tickUnref(n, fn) {
  if (n === 0) return fn();
  setImmediate(tickUnref, n - 1, fn).unref();
}

tickUnref(10, common.mustNotCall('The communication channel is still open'));