13 files declare their use of FacetSourcePluginManager in Facets 8

DefaultFacetManager.php in src/FacetManager/DefaultFacetManager.php

DefaultFacetsSummaryManager.php in modules/facets_summary/src/FacetsSummaryManager/DefaultFacetsSummaryManager.php

FacetCloneForm.php in src/Form/FacetCloneForm.php

FacetForm.php in src/Form/FacetForm.php

FacetSettingsForm.php in src/Form/FacetSettingsForm.php

FacetSourcePluginManagerTest.php in tests/src/Unit/FacetSource/FacetSourcePluginManagerTest.php

FacetsSummaryForm.php in modules/facets_summary/src/Form/FacetsSummaryForm.php

FacetsSummarySettingsForm.php in modules/facets_summary/src/Form/FacetsSummarySettingsForm.php

HideWhenNotRenderedProcessorTest.php in modules/facets_summary/tests/src/Unit/Plugin/Processor/HideWhenNotRenderedProcessorTest.php

LinksWidgetTest.php in tests/src/Unit/Plugin/widget/LinksWidgetTest.php

ListItemProcessorTest.php in tests/src/Unit/Plugin/processor/ListItemProcessorTest.php

QueryStringTest.php in tests/src/Unit/Plugin/url_processor/QueryStringTest.php

UrlProcessorHandlerTest.php in tests/src/Unit/Plugin/processor/UrlProcessorHandlerTest.php