# File lib/moneta/adapters/sequel.rb, line 69
      def increment(key, amount = 1, options = {})
        @backend.transaction do
          locked_table = @table.for_update
          if record = locked_table[:k => key]
            value = Utils.to_int(record[:v]) + amount
            locked_table.where(:k => key).update(:v => blob(value.to_s))
            value
          else
            locked_table.insert(:k => key, :v => blob(amount.to_s))
            amount
          end
        end
      rescue ::Sequel::DatabaseError
        # Concurrent modification might throw a bunch of different errors
        tries ||= 0
        (tries += 1) < 10 ? retry : raise
      end