pocketmine\level\generator\populator\Sugarcane::canSugarcaneStay PHP Method

    private function canSugarcaneStay($x, $y, $z)
    {
        $b = $this->level->getBlockIdAt($x, $y, $z);
        $below = $this->level->getBlockIdAt($x, $y - 1, $z);
        $water = false;
        foreach (array($this->level->getBlockIdAt($x + 1, $y - 1, $z), $this->level->getBlockIdAt($x - 1, $y - 1, $z), $this->level->getBlockIdAt($x, $y - 1, $z + 1), $this->level->getBlockIdAt($x, $y - 1, $z - 1)) as $adjacent) {
            if ($adjacent === Block::WATER or $adjacent === Block::STILL_WATER) {
                $water = true;
                break;
            }
        }
        return $b === Block::AIR and (($below === Block::SAND or $below === Block::GRASS) and $water or $below === Block::SUGARCANE_BLOCK);
    }