6 files declare their use of VersionGuesser

Factory.php in vendor/composer/composer/src/Composer/Factory.php
PathDownloader.php in vendor/composer/composer/src/Composer/Downloader/PathDownloader.php
PathRepository.php in vendor/composer/composer/src/Composer/Repository/PathRepository.php
RootPackageLoader.php in vendor/composer/composer/src/Composer/Package/Loader/RootPackageLoader.php
StatusCommand.php in vendor/composer/composer/src/Composer/Command/StatusCommand.php
VcsDownloader.php in vendor/composer/composer/src/Composer/Downloader/VcsDownloader.php