call(env) public

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# File actionpack/lib/action_dispatch/middleware/request_id.rb, line 23
    def call(env)
      req = ActionDispatch::Request.new env
      req.request_id = make_request_id(req.headers[@header])
      @app.call(env).tap { |_status, headers, _body| headers[@header] = req.request_id }
    end
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