# File lib/livejournal/sync.rb, line 60
      def self.subset_items(syncitems, want_type='L')
        items = {}
        syncitems.each do |item, time|
          next unless item =~ /^(.)-(\d+)$/
          type, id = $1, $2.to_i
          items[id] = time if type == want_type
        end
        items
      end