New methods added to BatchBuilder to prevent batch sets from being added more than once

To prevent duplicate batches from being created inadvertently in the same page request, you can use Drupal\Core\Batch\BatchBuilder::registerSetId() and Drupal\Core\Batch\BatchBuilder:isSetIdRegistered() to check and see if this batch has been built before.

Example:

use Drupal\Core\Batch\BatchBuilder;

...

if (!BatchBuilder::isSetIdRegistered('my_unique_id')) {
  $batch_builder = (new BatchBuilder())
    ->registerSetId('my_unique_id')
    ->setTitle(t('Batch Title'))
    ->setFinishCallback('batch_example_finished_callback')
    ->setInitMessage(t('The initialization message (optional)'));
  foreach ($ids as $id) {
    $batch_builder->addOperation('batch_example_callback', [$id]);
  }
  batch_set($batch_builder->toArray());
}