19 files declare their use of ViewEntityInterface

AddHandler.php in core/modules/views_ui/src/Form/Ajax/AddHandler.php
ConfigHandler.php in core/modules/views_ui/src/Form/Ajax/ConfigHandler.php
ConfigHandlerExtra.php in core/modules/views_ui/src/Form/Ajax/ConfigHandlerExtra.php
ConfigHandlerGroup.php in core/modules/views_ui/src/Form/Ajax/ConfigHandlerGroup.php
datetime_range.module in core/modules/datetime_range/datetime_range.module
Field hooks to implement a datetime field that stores a start and end date.
dblog.module in core/modules/dblog/dblog.module
System monitoring and logging for administrators.
Display.php in core/modules/views_ui/src/Form/Ajax/Display.php
Rearrange.php in core/modules/views_ui/src/Form/Ajax/Rearrange.php
rest.module in core/modules/rest/rest.module
RESTful web services module.
SqlTest.php in core/modules/views/tests/src/Unit/Plugin/query/SqlTest.php
View.php in core/modules/views/src/Entity/View.php
views.module in core/modules/views/views.module
Primarily Drupal hooks and global API functions to manipulate views.
ViewsEntitySchemaSubscriber.php in core/modules/views/src/EventSubscriber/ViewsEntitySchemaSubscriber.php
ViewsFormBase.php in core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php
ViewsFormInterface.php in core/modules/views_ui/src/Form/Ajax/ViewsFormInterface.php
ViewsModerationStateFilterTest.php in core/modules/content_moderation/tests/src/Functional/ViewsModerationStateFilterTest.php
ViewsUIController.php in core/modules/views_ui/src/Controller/ViewsUIController.php
views_test_data.module in core/modules/views/tests/modules/views_test_data/views_test_data.module
Helper module for Views tests.
ViewUI.php in core/modules/views_ui/src/ViewUI.php

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