I don't understand why this line is not covered in the coverage

PHP 8.3.
OS: Ubuntu-22.04.
PHPUNIT: 9.6.

In the codecov cli on github action:

 - name: Upload coverage to Codecov.
   if: matrix.php == '8.1'
   uses: codecov/codecov-action@v4
   with:
     disable_file_fixes: true
     file: ./coverage.xml
     token: ${{ secrets.CODECOV_TOKEN }}

Any ideas, thanks.

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