Function unstable_getThreadID

docs/external/js/react.development.js:2933–2935

()

    }
  }
  function unstable_getThreadID() {
    return ++threadIDCounter;
  }
  function unstable_trace(name, timestamp, callback) {
    var threadID = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : DEFAULT_THREAD_ID;