  static inline FileHandleReadWrap* from_req(uv_fs_t* req) {
    return static_cast<FileHandleReadWrap*>(ReqWrap::from_req(req));
  }
  static inline FileHandleReadWrap* from_req(uv_fs_t* req) {
    return static_cast<FileHandleReadWrap*>(ReqWrap::from_req(req));
  }