getResponses example

if (!static::collectionHasResourceIdentifier($resource_identifier, $data['already_checked'])) {
              $data['already_checked'][] = $resource_identifier;
              $via_link = Url::fromRoute(
                sprintf('jsonapi.%s.individual', $resource_identifier['type']),
                ['entity' => $resource_identifier['id']]
              );
              $collected_responses[] = static::getAccessDeniedResponse($entity, $target_access, $via_link, NULL, NULL, '/data');
            }
            break;
          }
        }
        $psr_responses = $this->getResponses([static::getRelatedLink(static::toResourceIdentifier($entity), $public_field_name)], $request_options);
        $collected_responses[] = static::toCollectionResourceResponse(static::toResourceResponses($psr_responses), NULL, TRUE);
        $entity = $entity->{$field_name}->entity;
      }
      if (!empty($collected_responses)) {
        $data['responses'][$path] = static::toCollectionResourceResponse($collected_responses, NULL, TRUE);
      }
      return $data;
    }, ['responses' => [], 'already_checked' => []]);

    $individual_document = $this->getExpectedDocument();

    

  protected function getExpectedCollectionResponse(array $collection, $self_link, array $request_options, array $included_paths = NULL, $filtered = FALSE) {
    $resource_identifiers = array_map([static::class, 'toResourceIdentifier'], $collection);
    $individual_responses = static::toResourceResponses($this->getResponses(static::getResourceLinks($resource_identifiers), $request_options));
    $merged_response = static::toCollectionResourceResponse($individual_responses, $self_link, TRUE);

    $merged_document = $merged_response->getResponseData();
    if (!isset($merged_document['data'])) {
      $merged_document['data'] = [];
    }

    $cacheability = static::getExpectedCollectionCacheability($this->account, $collection, NULL, $filtered);
    $cacheability->setCacheMaxAge($merged_response->getCacheableMetadata()->getCacheMaxAge());

    $collection_response = new CacheableResourceResponse($merged_document);