public function onPlayerTriggerEditorTask(PlayerTriggerEditorTaskEvent $event) : void{
	$player = $event->getPlayer();
	$task = $event->getTask();

	$world = $event->getWorld();
	// TODO: Check if $world is not spawn_world

	$selection = $event->getSelection();
	// TODO: Check if all $selection->getPoints() lie in $player's plot.

	if($task instanceof SetEditorTask){
		$block = $task->getBlock();
		if($block->getId() === BlockLegacyIds::TNT){
			$event->setCancelled();
			$player->sendMessage("//set-ting " . $block->getName() . " is not allowed!");
		}
	}else{
		// disallow players from using anything else besides //set because i am a dick.
		$event->setCancelled();
		$player->sendMessage($task->getName() . " is disallowed on the server.");
	}
}

class MahEditorTaskListener implements EditorTaskListener{

	public function onRegister(EditorTask $task) : void{
		// Called after PlayerTriggerEditorTaskEvent has been triggered and the
		// event hasn't been cancelled.
	}
	
	public function onCompleteFraction(EditorTask $task, int $completed, int $total) : void{
		// Progress bar material here!
		// $player->sendPopup($task->getName() . " completed: " . sprintf("%0.2f", ($completed / $total) * 100) . "%");
	}
	
	public function onCompletion(EditorTask $task) : void{
		// $player->sendPopup($task->getName() . " completed!");
	}
}

/**
 * @param PlayerTriggerEditorTaskEvent $event
 * @priority MONITOR
 */
public function onPlayerTriggerEditorTask(PlayerTriggerEditorTaskEvent $event) : void{
	$task = $event->getTask();
	$handler = $task->registerListener(new MahEditorTaskListener());
	// Don't forget to call $handler->unregister() once the player quits the server, if
	// your listener is indirectly sending packets to the player.
	// It is not necessary to unregister a handler from a completed task, you can safely
	// register and forget.
}