6 string references to update.root in Drupal 8

UpdateManagerInstall::create in core/modules/update/src/Form/UpdateManagerInstall.php

Instantiates a new instance of this class.

UpdateReady::create in core/modules/update/src/Form/UpdateReady.php

Instantiates a new instance of this class.

UpdateTestBase::setUp in core/modules/update/src/Tests/UpdateTestBase.php

Sets up a Drupal site for running functional and integration tests.

UpdateTestBase::setUp in core/modules/update/tests/src/Functional/UpdateTestBase.php

UpdateUploadTest::testUploadModule in core/modules/update/tests/src/Functional/UpdateUploadTest.php

Tests upload, extraction, and update of a module.

update_authorize_batch_copy_project in core/modules/update/update.authorize.inc

Implements callback_batch_operation().