4 files declare their use of ConfigActionPluginInterface

EntityCreate.php in core/lib/Drupal/Core/Config/Action/Plugin/ConfigAction/EntityCreate.php
EntityMethod.php in core/lib/Drupal/Core/Config/Action/Plugin/ConfigAction/EntityMethod.php
PermissionsPerBundle.php in core/lib/Drupal/Core/Config/Action/Plugin/ConfigAction/PermissionsPerBundle.php
SimpleConfigUpdate.php in core/lib/Drupal/Core/Config/Action/Plugin/ConfigAction/SimpleConfigUpdate.php

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