remember_transaction_record_state

# File activerecord/lib/active_record/transactions.rb, line 387
      def remember_transaction_record_state
        @_start_transaction_state ||= {
          id: id,
          new_record: @new_record,
          previously_new_record: @previously_new_record,
          destroyed: @destroyed,
          attributes: @attributes,
          frozen?: frozen?,
          level: 0
        }
        @_start_transaction_state[:level] += 1

        if _committed_already_called
          @_new_record_before_last_commit = false
        else
          @_new_record_before_last_commit = @_start_transaction_state[:new_record]
        end
      end