10 files declare their use of ResponsiveImageStyle

MigrateResponsiveImageStylesTest.php in core/modules/responsive_image/tests/src/Kernel/Migrate/d7/MigrateResponsiveImageStylesTest.php
ResponsiveImageFieldDisplayTest.php in core/modules/responsive_image/tests/src/Functional/ResponsiveImageFieldDisplayTest.php
ResponsiveImageFieldUiTest.php in core/modules/responsive_image/tests/src/FunctionalJavascript/ResponsiveImageFieldUiTest.php
ResponsiveImageFormatter.php in core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php
ResponsiveImageIntegrationTest.php in core/modules/responsive_image/tests/src/Kernel/ResponsiveImageIntegrationTest.php
ResponsiveImageStyleConfigEntityUnitTest.php in core/modules/responsive_image/tests/src/Unit/ResponsiveImageStyleConfigEntityUnitTest.php
ResponsiveImageStyleResourceTestBase.php in core/modules/responsive_image/tests/src/Functional/Rest/ResponsiveImageStyleResourceTestBase.php
ResponsiveImageStyleTest.php in core/modules/jsonapi/tests/src/Functional/ResponsiveImageStyleTest.php
responsive_image.module in core/modules/responsive_image/responsive_image.module
Responsive image display formatter for image fields.
ViewsIntegrationTest.php in core/modules/responsive_image/tests/src/Functional/ViewsIntegrationTest.php

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.