def languages
      @sizes ||= begin
        sizes = Hash.new { 0 }
        cache.each do |_, (language, size)|
          sizes[language] += size
        end
        sizes
      end
    end
def languages
      @sizes ||= begin
        sizes = Hash.new { 0 }
        cache.each do |_, (language, size)|
          sizes[language] += size
        end
        sizes
      end
    end
Public: Returns a breakdown of language stats.

 Examples

   # => { 'Ruby' => 46319,
          'JavaScript' => 258 }

 Returns a Hash of language names and Integer size values.