# File lib/new_relic/agent/transaction_sampler.rb, line 299
      def start_builder(state, time=nil)
        if !enabled? || !state.is_transaction_traced? || !state.is_execution_traced?
          state.transaction_sample_builder = nil
        else
          state.transaction_sample_builder ||= TransactionSampleBuilder.new(time)
        end
      end