问Metro遇到了一个错误:无法读取未定义的属性(读取“转换文件”)。错误

EN

TransformFile(filePath, transformOptions) {
    var _this3 = this;

    return _asyncToGenerator(function*() {
      // We need to be sure that the DependencyGraph has been initialized.
      // TODO: Remove this ugly hack!
      yield _this3._depGraphPromise;
      return _this3._transformer.transformFile(filePath, transformOptions);
    })();