android/guava/src/com/google/common/collect/TreeRangeSet.java
public static <C extends Comparable<?>> TreeRangeSet<C> create() {
    return new TreeRangeSet<C>(new TreeMap<Cut<C>, Range<C>>());
  }
public static <C extends Comparable<?>> TreeRangeSet<C> create() {
    return new TreeRangeSet<C>(new TreeMap<Cut<C>, Range<C>>());
  }
Creates an empty {@code TreeRangeSet} instance.