9 files declare their use of CachePluginBase

DisplayKernelTest.php in core/modules/views/tests/src/Kernel/Plugin/DisplayKernelTest.php
media_library.module in core/modules/media_library/media_library.module
Contains hook implementations for the media_library module.
test_basetheme.theme in core/modules/system/tests/themes/test_basetheme/test_basetheme.theme
test_base_theme.theme in core/modules/system/tests/themes/test_base_theme/test_base_theme.theme
test_subtheme.theme in core/modules/system/tests/themes/test_subtheme/test_subtheme.theme
ViewExecutableTest.php in core/modules/views/tests/src/Unit/ViewExecutableTest.php
views.api.php in core/modules/views/views.api.php
Describes hooks and plugins provided by the Views module.
views_test_config.module in core/modules/views/tests/modules/views_test_config/views_test_config.module
views_test_data.views_execution.inc in core/modules/views/tests/modules/views_test_data/views_test_data.views_execution.inc

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