22declare(strict_types=1);
 
   43    public function getChunk(
int $chunkX, 
int $chunkZ) : ?
Chunk;
 
   45    public function setChunk(
int $chunkX, 
int $chunkZ, 
Chunk $chunk) : void;
 
   61    public function isInWorld(
int $x, 
int $y, 
int $z) : bool;
 
 
getBlockAt(int $x, int $y, int $z)
 
setBlockAt(int $x, int $y, int $z, Block $block)
 
isInWorld(int $x, int $y, int $z)