public boolean isBlockAlreadyInRoulette(Block block) {
		Set<Integer> tilesKeys = tilesLocations.keySet();
		for(Integer key : tilesKeys) {
			SerializableLocation blockLocation = new SerializableLocation(block.getLocation());
			if(tilesLocations.get(key).contains(blockLocation))
				return true;
		} Set<Integer> spinnersKeys = spinnersLocations.keySet();
		for(Integer key : spinnersKeys) {
			SerializableLocation blockLocation = new SerializableLocation(block.getLocation());
			if(spinnersLocations.get(key).equals(blockLocation))
				return true;
		} return false;
	}