# File lib/archive/zip/extra_field/extended_timestamp.rb, line 164
    def dump_local
      times = []
      times << mtime.to_i unless mtime.nil?
      times << atime.to_i unless atime.nil?
      times << crtime.to_i unless crtime.nil?
      ([ID, 4 * times.size + 1, flags] + times).pack('vvC' + 'V' * times.size)
    end