10 files declare their use of YamlDiscovery
- BreakpointManager.php in core/
modules/ breakpoint/ src/ BreakpointManager.php  - ConfigMapperManager.php in core/
modules/ config_translation/ src/ ConfigMapperManager.php  - ContextualLinkManager.php in core/
lib/ Drupal/ Core/ Menu/ ContextualLinkManager.php  - FieldTypeCategoryManager.php in core/
lib/ Drupal/ Core/ Field/ FieldTypeCategoryManager.php  - LinkRelationTypeManager.php in core/
lib/ Drupal/ Core/ Http/ LinkRelationTypeManager.php  - LocalActionManager.php in core/
lib/ Drupal/ Core/ Menu/ LocalActionManager.php  - LocalTaskIntegrationTestBase.php in core/
tests/ Drupal/ Tests/ Core/ Menu/ LocalTaskIntegrationTestBase.php  - LocalTaskManager.php in core/
lib/ Drupal/ Core/ Menu/ LocalTaskManager.php  - MenuLinkManager.php in core/
lib/ Drupal/ Core/ Menu/ MenuLinkManager.php  - YamlDiscoveryTest.php in core/
tests/ Drupal/ Tests/ Core/ Plugin/ Discovery/ YamlDiscoveryTest.php  
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