33 files declare their use of QueryInterface in Search API 8

BackendPluginBase.php in src/Backend/BackendPluginBase.php

BackendPluginBaseTest.php in tests/src/Unit/BackendPluginBaseTest.php

BackendSpecificInterface.php in src/Backend/BackendSpecificInterface.php

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

BackendTestBase.php in tests/src/Kernel/BackendTestBase.php

ContentAccess.php in src/Plugin/search_api/processor/ContentAccess.php

Database.php in modules/search_api_db/src/Plugin/search_api/backend/Database.php

FieldsProcessorPluginBase.php in src/Processor/FieldsProcessorPluginBase.php

Highlight.php in src/Plugin/search_api/processor/Highlight.php

HighlightTest.php in tests/src/Unit/Processor/HighlightTest.php

Index.php in src/Entity/Index.php

IndexInterface.php in src/IndexInterface.php

NoUi.php in tests/search_api_test_no_ui/src/Plugin/search_api/backend/NoUi.php

NumberFieldBoostTest.php in tests/src/Kernel/Processor/NumberFieldBoostTest.php

ProcessorInterface.php in src/Processor/ProcessorInterface.php

ProcessorPluginBase.php in src/Processor/ProcessorPluginBase.php

QueryPreExecuteEvent.php in src/Event/QueryPreExecuteEvent.php

QueryPreExecuteEvent.php in modules/search_api_db/src/Event/QueryPreExecuteEvent.php

QueryTest.php in tests/src/Kernel/System/QueryTest.php

RoleAccess.php in src/Plugin/search_api/processor/RoleAccess.php

SearchApiQuery.php in src/Plugin/views/query/SearchApiQuery.php

search_api.theme.inc in ./search_api.theme.inc

Defines theme functions for the Search API module.

search_api_test_db.search_api.inc in tests/search_api_test_db/search_api_test_db.search_api.inc

Contains hook implementations for testing Database Search.

search_api_test_hooks.module in tests/search_api_test_hooks/search_api_test_hooks.module

Tests all the hooks defined by the Search API module.

search_api_test_hooks.search_api.inc in tests/search_api_test_hooks/search_api_test_hooks.search_api.inc

Tests all the hooks defined by the Search API module.

search_api_test_views.module in tests/search_api_test_views/search_api_test_views.module

Contains hook implementations for the Search API Views Test module.

Server.php in src/Entity/Server.php

Stemmer.php in src/Plugin/search_api/processor/Stemmer.php

StemmerTest.php in tests/src/Unit/Processor/StemmerTest.php

Stopwords.php in src/Plugin/search_api/processor/Stopwords.php

TestBackend.php in tests/search_api_test/src/Plugin/search_api/backend/TestBackend.php

TestProcessor.php in tests/search_api_test/src/Plugin/search_api/processor/TestProcessor.php

UnsavedIndexConfiguration.php in src/UnsavedIndexConfiguration.php