structuredAttrs is enabled

trying https://files.pythonhosted.org/packages/df/73/b6e24bd22e6720ca8ee9a85a0c4a2971af8497d8f3193fa05390cbd46e09/backoff-2.2.1-py3-none-any.whl
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed

  0      0   0      0   0      0      0      0                              0
100  15148 100  15148   0      0  1.11M      0                              0
100  15148 100  15148   0      0  1.10M      0                              0
100  15148 100  15148   0      0  1.09M      0                              0