# File lib/fog/aws/models/storage/files.rb, line 96
        def head(key, options = {})
          requires :directory
          data = service.head_object(directory.key, key, options)
          normalize_headers(data)
          file_data = data.headers.merge({
            :key => key
          })
          new(file_data)
        rescue Excon::Errors::NotFound
          nil
        end