public String toRow() {
		if (columns.size() == 0) {
			return "";
		}
		StringBuilder builder = new StringBuilder();
		Iterator iterator = columns.iterator();
		while (iterator.hasNext()) {
			builder.append(iterator.next());
			if (iterator.hasNext()) {
				builder.append(outputDelimiter);
			}
		}
		return builder.toString();
	}