5 string references to menu.link_tree

Drupal::menuTree in core/lib/Drupal.php
Returns the menu tree.
DrupalTest::testMenuTree in core/tests/Drupal/Tests/Core/DrupalTest.php
Tests the menuTree() method.
LinksetController::create in core/modules/system/src/Controller/LinksetController.php
Instantiates a new instance of the implementing class using autowiring.
NavigationMenuBlockTest::setUp in core/modules/navigation/tests/src/Kernel/NavigationMenuBlockTest.php
NavigationMenuMarkupTest::setUp in core/modules/navigation/tests/src/Kernel/NavigationMenuMarkupTest.php

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