16 files declare their use of SearchApiEvents in Search API 8

BackendPluginManager.php in src/Backend/BackendPluginManager.php

BackendTest.php in modules/search_api_db/tests/src/Kernel/BackendTest.php

CommandHelper.php in src/Utility/CommandHelper.php

DatasourcePluginManager.php in src/Datasource/DatasourcePluginManager.php

DataTypeHelper.php in src/Utility/DataTypeHelper.php

DataTypePluginManager.php in src/DataType/DataTypePluginManager.php

DisplayPluginManager.php in src/Display/DisplayPluginManager.php

EventListener.php in tests/search_api_test_events/src/EventListener.php

Index.php in src/Entity/Index.php

ParseModePluginManager.php in src/ParseMode/ParseModePluginManager.php

ProcessorPluginManager.php in src/Processor/ProcessorPluginManager.php

Query.php in src/Query/Query.php

search_api.views.inc in ./search_api.views.inc

Views hook implementations for the Search API module.

Server.php in src/Entity/Server.php

TrackerPluginManager.php in src/Tracker/TrackerPluginManager.php

TrackingHelper.php in src/Utility/TrackingHelper.php