pocketmine\item\Item::isHoe PHP Method

    public function isHoe()
    {
        return false;
    }

 public function onActivate(Item $item, Player $player = null)
 {
     if ($item->isHoe()) {
         $item->useOn($this);
         $this->getLevel()->setBlock($this, Block::get(Item::FARMLAND, 0), true);
         return true;
     }
     return false;
 }