9 files declare their use of DefaultLazyPluginCollection in Drupal 8

ConditionPluginCollection.php in core/lib/Drupal/Core/Condition/ConditionPluginCollection.php

ConfigEntityBaseUnitTest.php in core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php

Contains \Drupal\Tests\Core\Config\Entity\ConfigEntityBaseUnitTest.

DefaultLazyPluginCollectionTest.php in core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php

DisplayPluginCollection.php in core/modules/views/src/DisplayPluginCollection.php

EntityDisplayPluginCollection.php in core/lib/Drupal/Core/Entity/EntityDisplayPluginCollection.php

FilterPluginCollection.php in core/modules/filter/src/FilterPluginCollection.php

ImageEffectPluginCollection.php in core/modules/image/src/ImageEffectPluginCollection.php

LazyPluginCollectionTestBase.php in core/tests/Drupal/Tests/Core/Plugin/LazyPluginCollectionTestBase.php

TipsPluginCollection.php in core/modules/tour/src/TipsPluginCollection.php