WithSubcommands.php

<?php

class WithSubcommands extends Command{
	public function __construct(Server $server){
		parent::__construct(blah, blah, blah);
		$this->map = new MySimpleCommandMap($server);
	}
	public function execute(CommandSender $sender, $label, $args){
		$this->map->dispatch($sender, implode(" ", $args));
	}
}
class MySimpleCommandMap{
	public function __construct(Server $server){
		$this->server = $server;
	}
}