can we add non block data(nbt preferably) in a chunk? I know we can add nbt data to a worlds and tileentity's but I don't know if we can add it to a chunk. Am I wrong about this?

I had some difficulties implementing it

@SubscribeEvent
public void ChunkDataEvent(ChunkDataEvent.Load event){
	System.out.print(" a|"+event.getData().getBoolean("data")+"|a ");
	event.getData().setBoolean("data",true);
	System.out.print(" "+event.getData().getBoolean("data")+"|b ");
}

@SubscribeEvent
public void ChunkDataEvent(ChunkDataEvent.Save event){
	System.out.print(" a|"+event.getData().getBoolean("data")+"|a ");
	event.getData().setBoolean("data",true);
	System.out.print(" "+event.getData().getBoolean("data")+"|b ");
}

when it loads it will return true twice, but when It saves it will only return true after I set 'data' to true,

I don't know if this is intended behavior or if I did something wrong?

I just thought that if we didn't specify the data it didn't change, but thank you on clearing up that it doesn't.