code: def proxy_uri
        if defined?(@proxy)
          if @proxy
            URI.parse(@proxy)
          else
            false
          end
        elsif RestClient.proxy_set?
          if RestClient.proxy
            URI.parse(RestClient.proxy)
          else
            false
          end
        else
          nil
        end
      end
docs: The proxy URI for this request. If `:proxy` was provided on this request,
   use it over `RestClient.proxy`.
  
   Return false if a proxy was explicitly set and is falsy.
  
   @return [URI, false, nil]