# File lib/grape/endpoint.rb, line 349
    def run_validators(validator_factories, request)
      validation_errors = []

      validators = validator_factories.map(&:create_validator)

      ActiveSupport::Notifications.instrument('endpoint_run_validators.grape', endpoint: self, validators: validators, request: request) do
        validators.each do |validator|
          begin
            validator.validate(request)
          rescue Grape::Exceptions::Validation => e
            validation_errors << e
            break if validator.fail_fast?
          rescue Grape::Exceptions::ValidationArrayErrors => e
            validation_errors += e.errors
            break if validator.fail_fast?
          end
        end
      end

      validation_errors.any? && raise(Grape::Exceptions::ValidationErrors, errors: validation_errors, headers: header)
    end