def _extract_options
      environment.to_options.merge(
        config:      rackup,
        Host:        environment.host,
        Port:        environment.port,
        AccessLog:   []
      )
    end
def _extract_options
      environment.to_options.merge(
        config:      rackup,
        Host:        environment.host,
        Port:        environment.port,
        AccessLog:   []
      )
    end
Options for Rack::Server superclass

 @since 0.8.0
 @api private