materialize_transactions

# File activerecord/lib/active_record/connection_adapters/abstract/transaction.rb, line 486
      def materialize_transactions
        return if @materializing_transactions

        if @has_unmaterialized_transactions
          @connection.lock.synchronize do
            begin
              @materializing_transactions = true
              @stack.each { |t| t.materialize! unless t.materialized? }
            ensure
              @materializing_transactions = false
            end
            @has_unmaterialized_transactions = false
          end
        end
      end