private void add(int ordinal, Attribute attr) {
		List<Attribute> list = ordinalAttributeMap.get(ordinal);
		if (list == null) {
			list = new ArrayList<Attribute>();
			ordinalAttributeMap.put(ordinal, list);
		}
		list.add(attr);
	}
<code>LibraryHints</code> provides a means of specifying certain LIBRARY
EXPORT attributes which should be included when the associated .exports file
is created.
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/LibraryHints.java