/** * {@inheritdoc} */ public static function sort(ConfigEntityInterface $a, ConfigEntityInterface $b) { // Sort the entities using the entity class's sort() method. // See \Drupal\Core\Config\Entity\ConfigEntityBase::sort(). /* @var $a WorkflowTransitionInterface */ /* @var $b WorkflowTransitionInterface */ if (!$a->getFromSid() || !$b->getFromSid()) { return 0; } // First sort on From-State. $from_state_a = $a->getFromState(); $from_state_b = $b->getFromState(); if ($from_state_a->weight < $from_state_b->weight) { return -1; } if ($from_state_a->weight > $from_state_b->weight) { return +1; } // Then sort on To-State. $to_state_a = $a->getToState(); $to_state_b = $b->getToState(); if ($to_state_a->weight < $to_state_b->weight) { return -1; } if ($to_state_a->weight > $to_state_b->weight) { return +1; } return 0; }