public XMLAttributeList addAttribute(String name, String value) {
public XMLAttributeList addAttribute(@NonNull String name, @NonNull String value) { if (name == null) throw new NullPointerException("name must be nonnull"); if (value == null) throw new NullPointerException("value must be nonnull");
	public XMLAttributeList addAttribute(String name, String value) {		nameValuePairList.add(new NameValuePair(name, value));		return this;	}