Custom validation constraints multi value paragraphs : how to get weight value

I am validating a multi value paragraph field using constraints.

/**
 * Implements hook_entity_bundle_field_info_alter().
 */
function cnfpt_internet_entity_bundle_field_info_alter(&$fields, \Drupal\Core\Entity\EntityTypeInterface $entity_type, $bundle) {
  if ($bundle === 'manifestation') {
    if (isset($fields['field_occurence'])) {
      // Add a validation.
      $fields['field_occurence']->addConstraint('Occurrence', []);
    }
  }
}

/**
 * Checks the mandatory fields of an occurence and ordere of the occurrences.
 *
 * @Constraint(
 *   id = "Occurrence",
 *   label = @Translation("Champ obligatoire par type d'occurence", context = "Validation"),
 *   type = "item"
 * )
 */
class OccurrenceConstraint extends Constraint {

  // Modalité requise pour occurrence distante.
  public $modaliteRequise = 'Le champ Modalité est requis';

  // Ville requise pour occurrence presentiel.
  public $villeRequise = 'Le champ Ville est requis';

  // Order of occurence
  public $ordreOccurrence = 'Les occurrences doivent être placées dans l\'ordre chronologique';

  // First occurence needs a contact.
  public $premiereOccurrenceContact = 'Un contact est obligatoire pour la première occurence';
}

field_occurence ist the paragraph field

My validate method starts like

 * Validates the Occurrence constraint.
 */
class OccurrenceConstraintValidator extends ConstraintValidator {
  /**
   * {@inheritdoc}
   */
  public function validate($items, Constraint $constraint) {

I have to make a validation taking into account the order of the paragraphs. If the paragraph is ordered with drag&drop there is no issue, I can take the delta value of items.

But if the weight is modified manually, I don't see how to get the modified weight value.

Any idea how to get the manually modified weight value?

Thanks Rainer

ในระหว่างนี้ฉันพบบทช่วยสอนนี้ https://philfrilling.com/blog/2018-09/custom-validation-multiple-dependent-entity-fields-drupal-8 ที่จะแก้ปัญหาของฉันได้ การจำกัดเอนทิตีทั้งหมดแทนที่จะเป็นฟิลด์ทำให้เข้าถึงเฉพาะข้อมูลที่ฉันต้องการเท่านั้น