public void toFtanML(Writer writer) {
		try {
			writer.append("[");
			Iterator<FtanValue> iterator=values.iterator();
			if(iterator.hasNext()) {
				iterator.next().toFtanML(writer);
			
				while(iterator.hasNext()) {
					writer.append(",");
					iterator.next().toFtanML(writer);
				}
			}
			writer.append("]");
		} catch(IOException e)
		{
			throw new IllegalStateException(e);
		}
	}