# File lib/new_relic/agent/cross_app_monitor.rb, line 60
      def save_referring_transaction_info(state, request_headers)
        txn_header = request_headers[NEWRELIC_TXN_HEADER_KEY] or return
        txn_info = deserialize_header(txn_header, NEWRELIC_TXN_HEADER)
        state.referring_transaction_info = txn_info
      end