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                return $loc;
            }
        }

        return null;
    }

    public static function pngToSkin(string $path): string
    {
        $img = @imagecreatefrompng($path);
        assert($img !== false);
        $bytes = str_ends_with($path, "-pc.png") ? self::fromJavaSkin($img) : self::fromBedrockSkin($img);
        @imagedestroy($img);
        return $bytes;
    }

    private static function fromJavaSkin(GdImage $img): string
    {
        $bytes = '';
        $colors = [];

#0 plugins/NPC/src/themestl/npc/NPCLoader(139): themestl\npc\NPCLoader::pngToSkin(string[43] /home/anmine/engine/settings/npcs/guide.png)
#1 plugins/NPC/src/themestl/npc/NPCLoader(99): themestl\npc\NPCLoader->createNPC(string[5] guide, object pocketmine\math\Vector3#77883, string[100] ... ..b..l........ .... ................r...f.... ................ .... ........, int 270, int 0, null, null, array[1])
#2 pmsrc/src/plugin/PluginBase(119): themestl\npc\NPCLoader->onEnable()
#3 pmsrc/src/plugin/PluginManager(456): pocketmine\plugin\PluginBase->onEnableStateChange(true)
#4 pmsrc/src/Server(1465): pocketmine\plugin\PluginManager->enablePlugin(object themestl\npc\NPCLoader#51056)
#5 pmsrc/src/Server(1086): pocketmine\Server->enablePlugins(object pocketmine\plugin\PluginEnableOrder#56568)
#6 pmsrc/src/PocketMine(355): pocketmine\Server->__construct(object pocketmine\thread\ThreadSafeClassLoader#2, object pocketmine\utils\MainLogger#6, string[25] /home/anmine/servers/s99/, string[33] /home/anmine/servers/s99/plugins/)
#7 pmsrc/src/PocketMine(378): pocketmine\server()
#8 /home/anmine/startup/tests/PocketMine-MP.phar(168): require(string[72] phar:///tmp/PocketMine-MP-phar-cache.0/PMMPCRJCBC.tar/src/PocketMine.php)