13 files declare their use of FieldPluginBase in Zircon Profile 8

BulkForm.php in core/modules/system/src/Plugin/views/field/BulkForm.php

Contains \Drupal\system\Plugin\views\field\BulkForm.

ContextualLinks.php in core/modules/contextual/src/Plugin/views/field/ContextualLinks.php

Contains \Drupal\contextual\Plugin\views\field\ContextualLinks.

DblogMessage.php in core/modules/dblog/src/Plugin/views/field/DblogMessage.php

Contains \Drupal\dblog\Plugin\views\field\DblogMessage.

DblogOperations.php in core/modules/dblog/src/Plugin/views/field/DblogOperations.php

Contains \Drupal\dblog\Plugin\views\field\DblogOperations.

EntityLink.php in core/modules/comment/src/Plugin/views/field/EntityLink.php

Contains \Drupal\comment\Plugin\views\field\EntityLink.

FieldKernelTest.php in core/modules/views/src/Tests/Handler/FieldKernelTest.php

Contains \Drupal\views\Tests\Handler\FieldKernelTest.

FieldPluginBaseTest.php in core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php

Contains \Drupal\Tests\views\Unit\Plugin\field\FieldPluginBaseTest.

FieldTest.php in core/modules/views/tests/modules/views_test_data/src/Plugin/views/field/FieldTest.php

Contains \Drupal\views_test_data\Plugin\views\field\FieldTest.

File.php in core/modules/file/src/Plugin/views/field/File.php

Contains \Drupal\file\Plugin\views\field\File.

Node.php in core/modules/node/src/Plugin/views/field/Node.php

Contains \Drupal\node\Plugin\views\field\Node.

Path.php in core/modules/node/src/Plugin/views/field/Path.php

Contains \Drupal\node\Plugin\views\field\Path.

StatisticsLastCommentName.php in core/modules/comment/src/Plugin/views/field/StatisticsLastCommentName.php

Contains \Drupal\comment\Plugin\views\field\StatisticsLastCommentName.

UserData.php in core/modules/user/src/Plugin/views/field/UserData.php

Contains \Drupal\user\Plugin\views\field\UserData.