Fixed block updates not getting broadcasted

src/pocketmine/block/Grass.php

@@ -23,6 +23,7 @@ namespace pocketmine\block;
 
 use pocketmine\item\Item;
 use pocketmine\level\generator\object\TallGrass;
+use pocketmine\level\Level;
 use pocketmine\Player;
 use pocketmine\utils\Random;
 
@@ -39,6 +40,10 @@ class Grass extends Solid{
 		);
 	}
 
+	public function onUpdate($type){
+
+	}
+
 	public function onActivate(Item $item, Player $player = null){
 		if($item->getID() === Item::DYE and $item->getDamage() === 0x0F){
 			$item->count--;