def _getCommandAndResponder(self, commandName):
<EOL>locator = self._remote.boxReceiver.locator<EOL>responder = locator.locateResponder(commandName)<EOL>responderFunction = responder.func_closure[<NUM_LIT:1>].cell_contents<EOL>command = responder.func_closure[<NUM_LIT:2>].cell_contents<EOL>return command, responderFunction<EOL>
Gets the command class and matching responder function for the
        given command name.