Yay generation uses async tasks

src/pocketmine/scheduler/AsyncPool.php

@@ -14,7 +14,7 @@
  * (at your option) any later version.
  *
  * @author PocketMine Team
-
+ * @link http://www.pocketmine.net/
  *
  *
 */
@@ -51,6 +51,10 @@ class AsyncPool{
 		}
 	}
 
+	public function getSize(){
+		return $this->size;
+	}
+
 	public function submitTask(AsyncTask $task){
 		if(isset($this->tasks[$task->getTaskId()]) or $task->isGarbage()){
 			return;