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[xoft]

You cannot reliably get all loaded chunks. You either want the chunks loaded, and use the cWorld:ChunkStay() function to make sure they are loaded, or keep track of the chunks using the loading and unloading hooks - those are serialized so you're guaranteed that the chunks that you have in your list are loaded. This won't work well with plugin reloads, though.

Alright, making a callback to enumerate all loaded chunks sounds like a good idea in this context.