pocketmine\level\format\leveldb\LevelDB::isChunkGenerated PHP Method

    public function isChunkGenerated($chunkX, $chunkZ)
    {
        if ($this->chunkExists($chunkX, $chunkZ) and ($chunk = $this->getChunk($chunkX, $chunkZ, false)) !== null) {
            return true;
        }
        return false;
    }