# File lib/new_relic/agent/javascript_instrumentor.rb, line 183
      def append_agent_attributes!(txn, atts)
        agent_attributes = txn.attributes.agent_attributes_for(NewRelic::Agent::AttributeFilter::DST_BROWSER_MONITORING)
        unless agent_attributes.empty?
          atts[ATTS_AGENT_SUBKEY] = agent_attributes
        end
      end