8 string references to 'Extension'

ConvertImageEffect::submitConfigurationForm in core/modules/image/src/Plugin/ImageEffect/ConvertImageEffect.php
custom_test_db.yml in core/modules/migrate/tests/modules/message_test/migrations/custom_test_db.yml
core/modules/migrate/tests/modules/message_test/migrations/custom_test_db.yml
d6_language_content_menu_settings.yml in core/modules/language/migrations/d6_language_content_menu_settings.yml
core/modules/language/migrations/d6_language_content_menu_settings.yml
d7_language_content_menu_settings.yml in core/modules/language/migrations/d7_language_content_menu_settings.yml
core/modules/language/migrations/d7_language_content_menu_settings.yml
FileViewsData::getViewsData in core/modules/file/src/FileViewsData.php
Returns views data for the entity type.
file_test_file_url_alter in core/modules/file/tests/file_test/file_test.module
Implements hook_file_url_alter().
image.schema.yml in core/modules/image/config/schema/image.schema.yml
core/modules/image/config/schema/image.schema.yml
views.view.file_extension_view.yml in core/modules/file/tests/modules/file_test_views/test_views/views.view.file_extension_view.yml
core/modules/file/tests/modules/file_test_views/test_views/views.view.file_extension_view.yml

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