# File lib/new_relic/agent/transaction_sample_builder.rb, line 118
      def transaction_trace_threshold #THREAD_LOCAL_ACCESS
        state = TransactionState.tl_get
        source_class = Agent.config.source(TT_THRESHOLD_KEY).class
        if source_class == Configuration::DefaultSource && state.current_transaction
          state.current_transaction.apdex_t * 4
        else
          Agent.config[TT_THRESHOLD_KEY]
        end
      end