# File lib/casclient/client.rb, line 157
    def request_proxy_ticket(pgt, target_service)
      uri = URI.parse(proxy_url)
      h = uri.query ? query_to_hash(uri.query) : {}
      h['pgt'] = pgt.ticket
      h['targetService'] = target_service
      uri.query = hash_to_query(h)
      
      pr = request_cas_response(uri, ProxyResponse)
      
      pt = ProxyTicket.new(pr.proxy_ticket, target_service)
      pt.response = pr
      
      return pt
    end