Method headSet

corpus/java/training/guava/collect/Maps.java:1053–1056

(E toElement)

      }

      @Override
      public SortedSet<E> headSet(E toElement) {
        return removeOnlySortedSet(super.headSet(toElement));
      }

      @Override
      public SortedSet<E> subSet(E fromElement, E toElement) {