Don't export names not owned by the package

[codecov[bot]]

Codecov Report

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

Project coverage is 88.22%. Comparing base (1425899) to head (d7fe64a).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## release-0.13 #203 +/- ## ================================================ - Coverage 88.37% 88.22% -0.15% ================================================ Files 11 11 Lines 1204 1206 +2 ================================================ Hits 1064 1064 - Misses 140 142 +2 ```

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