# File lib/facets/more/downloader.rb, line 78
  def add_mirrors( mirrors )
    mirrors.each { |mirror|
      case mirror
      when String
        url, rgn = *mirror.strip.split(' ')
        add_mirror( url, rgn.unbracket )
      when Array
        add_mirror( *mirror )
      when Hash
        add_mirror( mirror[:url], mirror[:region] )
      when Mirror
        @mirrors << mirror
      else
        raise "unrecogized mirror definition #{mirror.inspect}"
      end
    }
  end