docs: def register_resources(klass, registry, resource_class):
          """ meta model subscriber on resource registration.
  
          SecurityHub Findings Filter
          """
          for rtype, resource_manager in registry.items():
              if not resource_manager.has_arn():
                  continue
              if 'post-finding' in resource_manager.action_registry:
                  continue
              resource_class.filter_registry.register('finding', klass)