https://api.drupal.org/api/drupal/core%21modules%21migrate_drupal_ui%21src%21Form%21MigrateUpgradeFormBase.php/function/MigrateUpgradeFormBase%3A%3ArestartUpgradeForm/11.x
function MigrateUpgradeFormBase::restartUpgradeForm | Drupal API
functiondrupalapi
https://api.drupal.org/api/drupal/core%21modules%21migrate_drupal_ui%21src%21Form%21MigrateUpgradeFormBase.php/10
MigrateUpgradeFormBase.php | Drupal API
phpdrupalapi