SlimeWorld read-only status always true when importing vanilla world

[bennie3211]

Describe the issue
Creating a new SlimeWorld from a vanilla world using asp.readVanillaWorld() directly states that the SlimeWorld read-only flag is true when the slimeLoader is provided and not null. According to the documentation on infernalsuite.com it will set the read-only to true when the slimeLoader is null, but after testing it appears that the SlimeWorls read-only tag is always true even when the slimeLoader is not null.

Spigot version
This server is running AdvancedSlimePaper version 1.21.3-16529-main@fb817aa (2024-12-20T16:52:56Z) (Implementing API version 1.21.3-R0.1-SNAPSHOT)
You are running the latest version

Plugin version
N/A

How to reproduce

/**
 * Sets up a {@link SlimeWorld} asynchronously from the 'vanilla' directory. Or gives a reference to the already
 * loaded {@link SlimeWorld} if it is already loaded.
 *
 * @param importWorldName The name of the world to import to memory
 *
 * @return A {@link CompletableFuture} returning the setup {@link SlimeWorld}, or null when an exception occurs
 */
public @NotNull CompletableFuture<@Nullable SlimeWorld> importNewSlimeWorldAsync(@NotNull String importWorldName) {
    if (this.slimeApi.getLoadedWorld(importWorldName) != null) {
        return CompletableFuture.completedFuture(this.slimeApi.getLoadedWorld(importWorldName));
    }

    return CompletableFuture.supplyAsync(() -> {
        try {
            File worldDirectory = new File(this.vanillaDirectory, importWorldName);
            SlimeWorld slimeWorld;

            if (!worldDirectory.exists() || !worldDirectory.isDirectory()) {
                throw new IllegalStateException("The world directory does not exist.");
            }

            /*
            * Debugging if the loader is null, which can make it that the read-only status is true.
            * After testing this debug message it returns false, indicating that the slimeLoader is not null.
            */
            Logging.logDebug("Slime loader null? " + (this.slimeLoader == null), this);

            slimeWorld = this.slimeApi.readVanillaWorld(worldDirectory, importWorldName, this.slimeLoader);

            /*
             * Debugging if the world is read only after importing with the slimeLoader (that is not null).
             * The read-only status is given to be true at this point.
             */
            Logging.logDebug("Slime world is read-only: " + slimeWorld.isReadOnly(), this);

            return slimeWorld;
        } catch (Exception e) {
            throw new CompletionException(e);
        }
    });
}

Crash reports (if available)
It's not crashing but the logging from the version above is given as follows

[12:14:29 INFO]: GonnaKillYou2 issued server command: /rr create dungeon DO2
[12:14:29 INFO]: [RelicRush] me.gonnakillyou2.relicrush.worlds.WorldManager: Slime loader null? false
[12:14:29 INFO]: [STDOUT] [com.infernalsuite.aswm.serialization.anvil.AnvilWorldReader] Loading region file: r.-1.3.mca...
[12:14:29 INFO]: [STDOUT] [com.infernalsuite.aswm.serialization.anvil.AnvilWorldReader] Loading region file: r.-1.4.mca...
[12:14:30 INFO]: [STDOUT] [com.infernalsuite.aswm.serialization.anvil.AnvilWorldReader] Loading region file: r.-2.3.mca...
[12:14:30 INFO]: [STDOUT] [com.infernalsuite.aswm.serialization.anvil.AnvilWorldReader] Loading region file: r.-2.4.mca...
[12:14:31 INFO]: [RelicRush] me.gonnakillyou2.relicrush.worlds.WorldManager: Slime world is read-only: true
[12:14:31 INFO]: [RelicRush] me.gonnakillyou2.relicrush.dungeons.DungeonManager: Setting slime world for dungeon
[12:14:32 INFO]: [RelicRush] me.gonnakillyou2.relicrush.dungeons.DungeonManager: Starting an editing world
[12:14:32 INFO]: [AdvancedSlimePaper] Loading world DO2...
[12:14:32 INFO]: [AdvancedSlimePaper] World DO2 loaded in 53ms.