labelWeightMultisort example

  /** * {@inheritdoc} */
  public function getStates($state_ids = NULL) {
    if ($state_ids === NULL) {
      $state_ids = array_keys($this->configuration['states']);
    }
    /** @var \Drupal\workflows\StateInterface[] $states */
    $states = array_combine($state_ids, array_map([$this, 'getState'], $state_ids));
    return static::labelWeightMultisort($states);
  }

  /** * {@inheritdoc} */
  public function getState($state_id) {
    if (!isset($this->configuration['states'][$state_id])) {
      throw new \InvalidArgumentException("The state '$state_id' does not exist in workflow.");
    }
    return new State(
      $this,