8 files declare their use of DefaultSelection

CommentSelection.php in core/modules/comment/src/Plugin/EntityReferenceSelection/CommentSelection.php
FileSelection.php in core/modules/file/src/Plugin/EntityReferenceSelection/FileSelection.php
MediaSelection.php in core/modules/media/src/Plugin/EntityReferenceSelection/MediaSelection.php
NodeSelection.php in core/modules/node/src/Plugin/EntityReferenceSelection/NodeSelection.php
TermSelection.php in core/modules/taxonomy/src/Plugin/EntityReferenceSelection/TermSelection.php
TestSelection.php in core/modules/block_content/tests/modules/block_content_test/src/Plugin/EntityReferenceSelection/TestSelection.php
UserSelection.php in core/modules/user/src/Plugin/EntityReferenceSelection/UserSelection.php
WorkspaceSelection.php in core/modules/workspaces/src/Plugin/EntityReferenceSelection/WorkspaceSelection.php

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