zone-run-source.ts

class Zone {
  public run<T>(
    callback: (...args: any[]) => T,
    applyThis?: any,
    applyArgs?: any,
    source?: string
  ): T {
    _currentZoneFrame = {
      parent: _currentZoneFrame,
      zone: this
    };

    try {
      return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
    } finally {
      _currentZoneFrame = _currentZoneFrame.parent!;
    }
  }
}