14 string references to default_plugin_manager

ckeditor.services.yml in core/modules/ckeditor/ckeditor.services.yml
core/modules/ckeditor/ckeditor.services.yml
ckeditor5.services.yml in core/modules/ckeditor5/ckeditor5.services.yml
core/modules/ckeditor5/ckeditor5.services.yml
core.services.yml in core/core.services.yml
core/core.services.yml
editor.services.yml in core/modules/editor/editor.services.yml
core/modules/editor/editor.services.yml
filter.services.yml in core/modules/filter/filter.services.yml
core/modules/filter/filter.services.yml
help.services.yml in core/modules/help/help.services.yml
core/modules/help/help.services.yml
image.services.yml in core/modules/image/image.services.yml
core/modules/image/image.services.yml
layout_builder.services.yml in core/modules/layout_builder/layout_builder.services.yml
core/modules/layout_builder/layout_builder.services.yml
lazy_route_provider_install_test.services.yml in core/modules/system/tests/modules/lazy_route_provider_install_test/lazy_route_provider_install_test.services.yml
core/modules/system/tests/modules/lazy_route_provider_install_test/lazy_route_provider_install_test.services.yml
media.services.yml in core/modules/media/media.services.yml
core/modules/media/media.services.yml
quickedit.services.yml in core/modules/quickedit/quickedit.services.yml
core/modules/quickedit/quickedit.services.yml
search.services.yml in core/modules/search/search.services.yml
core/modules/search/search.services.yml
tour.services.yml in core/modules/tour/tour.services.yml
core/modules/tour/tour.services.yml
workflows.services.yml in core/modules/workflows/workflows.services.yml
core/modules/workflows/workflows.services.yml

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