@Override
	public int compare(BookmarkType bt1, BookmarkType bt2) {
		return bt1.getTypeString().compareTo(bt2.getTypeString());
	}
Comparator for bookmark types.
@param bt1 first bookmark type
@param bt2 second bookmark type
@return a negative integer, zero, or a positive integer as the
	       first argument is less than, equal to, or greater than the
	       second.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/listing/BookmarkTypeComparator.java