6 methods override DefaultPluginManager::processDefinition()

BlockManager::processDefinition in core/lib/Drupal/Core/Block/BlockManager.php
Performs extra processing on plugin definitions.
CategorizingPluginManager::processDefinition in core/tests/Drupal/Tests/Core/Plugin/CategorizingPluginManagerTraitTest.php
Performs extra processing on plugin definitions.
ConfigMapperManager::processDefinition in core/modules/config_translation/src/ConfigMapperManager.php
Performs extra processing on plugin definitions.
MigrateFieldPluginManager::processDefinition in core/modules/migrate_drupal/src/Plugin/MigrateFieldPluginManager.php
Performs extra processing on plugin definitions.
MigrationPluginManager::processDefinition in core/modules/migrate_drupal/src/MigrationPluginManager.php
Performs extra processing on plugin definitions.
QueueWorkerManager::processDefinition in core/lib/Drupal/Core/Queue/QueueWorkerManager.php
Performs extra processing on plugin definitions.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.