Method copyMetadataToCallback

packages/core/router/router-explorer.ts:451–462

(
    originalCallback: RouterProxyCallback,
    targetCallback: Function,
  )

  }

  private copyMetadataToCallback(
    originalCallback: RouterProxyCallback,
    targetCallback: Function,
  ) {
    for (const key of Reflect.getMetadataKeys(originalCallback)) {
      Reflect.defineMetadata(
        key,
        Reflect.getMetadata(key, originalCallback),
        targetCallback,
      );
    }
  }
}