def start(self):
if self._with_discovery:<EOL><INDENT>self.upnp.server.set_spawn(<NUM_LIT:2>)<EOL>self.upnp.server.start()<EOL><DEDENT>if self._with_subscribers:<EOL><INDENT>self.registry.server.set_spawn(<NUM_LIT:2>)<EOL>self.registry.server.start()<EOL><DEDENT>
Start the server(s) necessary to receive information from devices.