# File lib/sass/importers/filesystem.rb, line 193
      def split(name)
        extension = nil
        dirname, basename = File.dirname(name), File.basename(name)
        if basename =~ /^(.*)\.(#{extensions.keys.map {|e| Regexp.escape(e)}.join('|')})$/
          basename = $1
          extension = $2
        end
        [dirname, basename, extension]
      end