7 files declare their use of PluginDefinitionInterface in Drupal 9
- DefaultFactory.php in core/
lib/ Drupal/ Component/ Plugin/ Factory/ DefaultFactory.php - DefaultFactoryTest.php in core/
tests/ Drupal/ Tests/ Component/ Plugin/ DefaultFactoryTest.php - DefaultPluginManager.php in core/
lib/ Drupal/ Core/ Plugin/ DefaultPluginManager.php - EntityTypeInterface.php in core/
lib/ Drupal/ Core/ Entity/ EntityTypeInterface.php - LayoutDefinition.php in core/
lib/ Drupal/ Core/ Layout/ LayoutDefinition.php - PluginDependencyTrait.php in core/
lib/ Drupal/ Core/ Plugin/ PluginDependencyTrait.php - PluginDependencyTraitTest.php in core/
tests/ Drupal/ Tests/ Core/ Plugin/ PluginDependencyTraitTest.php