6 files declare their use of DeleteMultipleForm

ConfirmDeleteMultiple.php in core/modules/comment/src/Form/ConfirmDeleteMultiple.php
DeleteMultiple.php in core/modules/node/src/Form/DeleteMultiple.php
EntityTestMulRevPub.php in core/modules/system/tests/modules/entity_test/src/Entity/EntityTestMulRevPub.php
EntityTestRev.php in core/modules/system/tests/modules/entity_test/src/Entity/EntityTestRev.php
EntityTestRevPub.php in core/modules/system/tests/modules/entity_test/src/Entity/EntityTestRevPub.php
Media.php in core/modules/media/src/Entity/Media.php

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