This is useful to ensure that all classes covered by the defined autoload information in the composer.json.

Add to your composer.json in the require-dev section:

"contao-community-alliance/build-system-tool-autoloading-validation": "~1.0"

Call the binary:

./vendor/bin/check-autoloading.php

Optionally pass the root of the git repository to check:

./vendor/bin/check-autoloading.php /path/to/some/repository