# File lib/directory_watcher.rb, line 253
  def self.libpath( *args, &block )
    rv =  args.empty? ? LIBPATH : ::File.join(LIBPATH, args.flatten)
    if block
      begin
        $LOAD_PATH.unshift LIBPATH
        rv = block.call
      ensure
        $LOAD_PATH.shift
      end
    end
    return rv
  end