6 files declare their use of StatementInterface in Zircon Profile 8.0

EmptyStatementTest.php in core/tests/Drupal/Tests/Core/Database/EmptyStatementTest.php

Contains \Drupal\Tests\Core\Database\EmptyStatementTest.

FetchTest.php in core/modules/system/src/Tests/Database/FetchTest.php

Contains \Drupal\system\Tests\Database\FetchTest.

node.module in core/modules/node/node.module

The core module that allows content to be submitted to the site.

NodeSearch.php in core/modules/node/src/Plugin/Search/NodeSearch.php

Contains \Drupal\node\Plugin\Search\NodeSearch.

PagerPluginBaseTest.php in core/modules/views/tests/src/Unit/Plugin/pager/PagerPluginBaseTest.php

Contains \Drupal\Tests\views\Unit\Plugin\pager\PagerPluginBaseTest.

Statement.php in core/lib/Drupal/Core/Database/Driver/sqlite/Statement.php

Contains \Drupal\Core\Database\Driver\sqlite\Statement.