# File lib/dbus/bus.rb, line 423
    def introspect(dest, path)
      if not block_given?
        # introspect in synchronous !
        data = introspect_data(dest, path)
        pof = DBus::ProxyObjectFactory.new(data, self, dest, path)
        return pof.build
      else
        introspect_data(dest, path) do |async_data|
          yield(DBus::ProxyObjectFactory.new(async_data, self, dest, path).build)
        end
      end
    end