call

# File actionpack/lib/action_dispatch/middleware/request_id.rb, line 19
    def call(env)
      env["action_dispatch.request_id"] = external_request_id(env) || internal_request_id
      @app.call(env).tap { |_status, headers, _body| headers["X-Request-Id"] = env["action_dispatch.request_id"] }
    end