validate_service_configuration

# File activestorage/app/models/active_storage/blob.rb, line 155
    def validate_service_configuration(service_name, model_class, association_name) # :nodoc:
      if service_name
        services.fetch(service_name) do
          raise ArgumentError, "Cannot configure service #{service_name.inspect} for #{model_class}##{association_name}"
        end
      else
        validate_global_service_configuration
      end
    end