10 files declare their use of Variable

Datelist.php in core/lib/Drupal/Core/Datetime/Element/Datelist.php
DatelistElementFormTest.php in core/tests/Drupal/KernelTests/Core/Datetime/DatelistElementFormTest.php
Datetime.php in core/lib/Drupal/Core/Datetime/Element/Datetime.php
DatetimeElementFormTest.php in core/tests/Drupal/KernelTests/Core/Datetime/DatetimeElementFormTest.php
DbDumpCommand.php in core/lib/Drupal/Core/Command/DbDumpCommand.php
Extract.php in core/modules/migrate/src/Plugin/migrate/process/Extract.php
Renderer.php in core/lib/Drupal/Core/Render/Renderer.php
StaticMap.php in core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
StaticMapTest.php in core/modules/migrate/tests/src/Unit/process/StaticMapTest.php
VariableTest.php in core/tests/Drupal/Tests/Component/Utility/VariableTest.php
Contains \Drupal\Tests\Component\Utility\VariableTest.

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