# File lib/new_relic/agent/cross_app_tracing.rb, line 58
      def insert_request_headers(request, txn_guid, trip_id, path_hash, synthetics_header)
        cross_app_id = NewRelic::Agent.config[:cross_process_id]
        txn_data  = NewRelic::JSONWrapper.dump([txn_guid, false, trip_id, path_hash])

        request[NR_ID_HEADER]  = obfuscator.obfuscate(cross_app_id)
        request[NR_TXN_HEADER] = obfuscator.obfuscate(txn_data)
        if synthetics_header
          request[NR_SYNTHETICS_HEADER] = synthetics_header
        end
      end