12 files declare their use of TwigPluginBase in Twig Extender 4.x

BaseMoment.php in modules/twig_extender_extras/src/Plugin/TwigPlugin/BaseMoment.php

BlockCreate.php in src/Plugin/TwigPlugin/BlockCreate.php

BlockView.php in src/Plugin/TwigPlugin/BlockView.php

CurrentLanguage.php in src/Plugin/TwigPlugin/CurrentLanguage.php

FieldFormatter.php in modules/twig_extender_extras/src/Plugin/TwigPlugin/FieldFormatter.php

FieldItems.php in modules/twig_extender_extras/src/Plugin/TwigPlugin/FieldItems.php

IsFront.php in src/Plugin/TwigPlugin/IsFront.php

RenderAs.php in src/Plugin/TwigPlugin/RenderAs.php

ToUrl.php in src/Plugin/TwigPlugin/ToUrl.php

Truncate.php in src/Plugin/TwigPlugin/Truncate.php

UrlValue.php in modules/twig_extender_extras/src/Plugin/TwigPlugin/UrlValue.php

UserIsLoggedIn.php in src/Plugin/TwigPlugin/UserIsLoggedIn.php