# File lib/new_relic/agent/transaction.rb, line 232
      def self.add_agent_attribute(key, value, default_destinations)
        if txn = tl_current
          txn.add_agent_attribute(key, value, default_destinations)
        else
          NewRelic::Agent.logger.debug "Attempted to add agent attribute: #{key} without transaction"
        end
      end