classApi; gop_autogen add generated header

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (1dfe320) 90.47% compared to head (37658ff) 90.47%. Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #70 +/- ## ======================================= Coverage 90.47% 90.47% ======================================= Files 12 12 Lines 105 105 ======================================= Hits 95 95 Misses 10 10 ```

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