9 files declare their use of ViewUI

ViewsUIController.php in core/modules/views_ui/src/Controller/ViewsUIController.php
views_ui.api.php in core/modules/views_ui/views_ui.api.php
views_ui_test_theme.theme in core/modules/views_ui/tests/themes/views_ui_test_theme/views_ui_test_theme.theme
ViewUIConverter.php in core/modules/views_ui/src/ParamConverter/ViewUIConverter.php
ViewUIObjectTest.php in core/modules/views_ui/tests/src/Unit/ViewUIObjectTest.php
WizardPluginBase.php in core/modules/views/src/Plugin/views/wizard/WizardPluginBase.php
WizardPluginBaseKernelTest.php in core/modules/views/tests/src/Kernel/Wizard/WizardPluginBaseKernelTest.php
WorkspaceViewsIntegrationTest.php in core/modules/workspaces/tests/src/Kernel/WorkspaceViewsIntegrationTest.php
WorkspaceViewsKernelTest.php in core/modules/workspaces/tests/src/Kernel/WorkspaceViewsKernelTest.php

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