static readonly ERR_FR_TOO_MANY_REDIRECTS = "ERR_FR_TOO_MANY_REDIRECTS";
  static readonly ERR_BAD_OPTION_VALUE = "ERR_BAD_OPTION_VALUE";
  static readonly ERR_BAD_OPTION = "ERR_BAD_OPTION";
  static readonly ERR_NETWORK = "ERR_NETWORK";
  static readonly ERR_DEPRECATED = "ERR_DEPRECATED";
  static readonly ERR_BAD_RESPONSE = "ERR_BAD_RESPONSE";
  static readonly ERR_BAD_REQUEST = "ERR_BAD_REQUEST";
  static readonly ERR_CANCELED = "ERR_CANCELED";
  static readonly ECONNABORTED = "ECONNABORTED";
  static readonly ETIMEDOUT = "ETIMEDOUT";