7 files declare their use of ProviderInterface

CdnCacheTtlAssets.php in src/Plugin/Setting/Advanced/Cdn/CdnCacheTtlAssets.php
CdnCacheTtlBase.php in src/Plugin/Setting/Advanced/Cdn/CdnCacheTtlBase.php
CdnCacheTtlLibrary.php in src/Plugin/Setting/Advanced/Cdn/CdnCacheTtlLibrary.php
CdnCacheTtlThemes.php in src/Plugin/Setting/Advanced/Cdn/CdnCacheTtlThemes.php
CdnCacheTtlVersions.php in src/Plugin/Setting/Advanced/Cdn/CdnCacheTtlVersions.php
CdnProvider.php in src/Plugin/Setting/Advanced/Cdn/CdnProvider.php
CdnProviderBase.php in src/Plugin/Setting/Advanced/Cdn/CdnProviderBase.php