6 files declare their use of OpenIDConnectClientBase in OpenID Connect / OAuth client 2.x

OpenIDConnectFacebookClient.php in src/Plugin/OpenIDConnectClient/OpenIDConnectFacebookClient.php

OpenIDConnectGenericClient.php in src/Plugin/OpenIDConnectClient/OpenIDConnectGenericClient.php

OpenIDConnectGithubClient.php in src/Plugin/OpenIDConnectClient/OpenIDConnectGithubClient.php

OpenIDConnectGoogleClient.php in src/Plugin/OpenIDConnectClient/OpenIDConnectGoogleClient.php

OpenIDConnectLinkedinClient.php in src/Plugin/OpenIDConnectClient/OpenIDConnectLinkedinClient.php

OpenIDConnectOktaClient.php in src/Plugin/OpenIDConnectClient/OpenIDConnectOktaClient.php