code: public function configure(array $configuration = null)
      {
          if (
              null !== $configuration &&
              (\array_key_exists('align_equals', $configuration) || \array_key_exists('align_double_arrow', $configuration))
          ) {
              $configuration = $this->resolveOldConfig($configuration);
          }
  
          parent::configure($configuration);
  
          $this->operators = $this->resolveOperatorsFromConfig();
      }
docs: {@inheritdoc}