Ради теста

<?php

namespace roma;

use pocketmine\plugin\PluginBase;
use pocketmine\command\{Command, CommandSender};

class Main extends PluginBase{
    public function onEnable(){
         $this->getServer()->getLogger()->info("тест");
    }
    public function onCommand(CommandSender $p, Command $cmd, $label, array $args) : bool{
          switch($cmd->getName()){
              case "Roma";
                   $p->sendTitle("просто скучно");
              break;
          }
    }
}