Removed deprecated use of InvertibleComparator in favor of Java 8's Comparator.reversed(). Made comparator field final. Added non-null assertions. Removed superfluous generic method type hints. Javadoc.
Removed deprecated use of InvertibleComparator in favor of Java 8's Comparator.reversed(). Made comparator field final. Added non-null assertions. Removed superfluous generic method type hints. Javadoc.