validate_service_configuration

# File activestorage/lib/active_storage/attached/model.rb, line 259
      def validate_service_configuration(service_name, model_class, association_name) # :nodoc:
        if service_name
          ActiveStorage::Blob.services.fetch(service_name) do
            raise ArgumentError, "Cannot configure service #{service_name.inspect} for #{model_class}##{association_name}"
          end
        else
          validate_global_service_configuration(model_class)
        end
      end