reset_transaction

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 385
      def reset_transaction(restore: false) # :nodoc:
        # Store the existing transaction state to the side
        old_state = @transaction_manager if restore && @transaction_manager&.restorable?

        @transaction_manager = ConnectionAdapters::TransactionManager.new(self)

        if block_given?
          # Reconfigure the connection without any transaction state in the way
          result = yield

          # Now the connection's fully established, we can swap back
          if old_state
            @transaction_manager = old_state
            @transaction_manager.restore_transactions
          end

          result
        end
      end