https://api.drupal.org/api/drupal/core%21modules%21migrate_drupal_ui%21tests%21src%21Functional%21MigrateUpgradeExecuteTestBase.php/property/MigrateUpgradeExecuteTestBase%3A%3AexpectedLoggedErrors/10
MigrateUpgradeExecuteTestBase::$expectedLoggedErrors | Drupal API
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