7 files declare their use of DataDefinitionInterface in Drupal 10

ComputedFileUrlTest.php in core/modules/file/tests/src/Kernel/ComputedFileUrlTest.php

DateTimeComputed.php in core/modules/datetime/src/DateTimeComputed.php

EntityFieldTest.php in core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php

FieldItemList.php in core/lib/Drupal/Core/Field/FieldItemList.php

ListElement.php in core/modules/config_translation/src/FormElement/ListElement.php

TextProcessed.php in core/modules/text/src/TextProcessed.php

TypedDataDefinitionTest.php in core/tests/Drupal/KernelTests/Core/TypedData/TypedDataDefinitionTest.php