    # File lib/rubygems/source_info_cache.rb, line 143
      def latest_cache_data
        latest_cache_data = {}

        cache_data.each do |repo, sice|
          latest = sice.source_index.latest_specs

          new_si = Gem::SourceIndex.new
          new_si.add_specs(*latest)

          latest_sice = Gem::SourceInfoCacheEntry.new new_si, sice.size
          latest_cache_data[repo] = latest_sice
        end

        latest_cache_data
      end