17 files declare their use of PoItem

common.inc in core/includes/common.inc
Common functions that many Drupal modules will need to reference.
locale.module in core/modules/locale/locale.module
Enables the translation of the user interface to languages other than English.
LocaleJavascriptTranslationTest.php in core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php
LocaleLocaleLookupTest.php in core/modules/locale/tests/src/Functional/LocaleLocaleLookupTest.php
LocaleLookup.php in core/modules/locale/src/LocaleLookup.php
LocaleLookupTest.php in core/modules/locale/tests/src/Unit/LocaleLookupTest.php
LocalePluralFormatTest.php in core/modules/locale/tests/src/Functional/LocalePluralFormatTest.php
NumericField.php in core/modules/views/src/Plugin/views/field/NumericField.php
NumericFormatPluralTest.php in core/modules/views/tests/src/Functional/Plugin/NumericFormatPluralTest.php
PluralTranslatableMarkup.php in core/lib/Drupal/Core/StringTranslation/PluralTranslatableMarkup.php
PluralVariants.php in core/modules/config_translation/src/FormElement/PluralVariants.php
PoDatabaseReader.php in core/modules/locale/src/PoDatabaseReader.php
PoDatabaseWriter.php in core/modules/locale/src/PoDatabaseWriter.php
PoStreamWriterTest.php in core/tests/Drupal/Tests/Component/Gettext/PoStreamWriterTest.php
StringBase.php in core/modules/locale/src/StringBase.php
system.module in core/modules/system/system.module
Configuration system that lets administrators modify the workings of the site.
TranslateEditForm.php in core/modules/locale/src/Form/TranslateEditForm.php

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