11 files declare their use of ElementInfoManagerInterface

AjaxRenderer.php in core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php
FiberPlaceholderTest.php in core/modules/big_pipe/tests/src/Unit/Render/FiberPlaceholderTest.php
FieldConfigEditForm.php in core/modules/field_ui/src/Form/FieldConfigEditForm.php
FieldConfigEditFormTest.php in core/modules/field_ui/tests/src/Unit/FieldConfigEditFormTest.php
FileUploadForm.php in core/modules/media_library/src/Form/FileUploadForm.php
FileWidget.php in core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php
FormBuilder.php in core/lib/Drupal/Core/Form/FormBuilder.php
ImageWidget.php in core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
LazyBuilders.php in core/modules/announcements_feed/src/LazyBuilders.php
ViewEditForm.php in core/modules/views_ui/src/ViewEditForm.php
WorkspacesLazyBuilders.php in core/modules/workspaces/src/WorkspacesLazyBuilders.php

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