Is there a reason the parameter name for ForwardingMap.remove(Object object) does not match the interface: Map.remove(Object key)?  In short: 'object' != 'key'
If yes, please kindly explain the history.
Else, can we rename to 'key' to match the interface?
.iterator();
      return new AbstractIterator<Entry<Cut<C>, Range<C>>>() {
        @Override
        protected Entry<Cut<C>, Range<C>> computeNext() {
          if (!completeRangeItr.hasNext()) {
            return endOfData();
          }
          Range<C> nextRange = completeRangeItr.next();
          if (restriction.lowerBound.compareTo(nextRange.upperBound) >= 0) {
            return endOfData();
          }
          nextRange = nextRange.intersection(restriction);
          if (lowerBoundWindow.contains(nextRange.lowerBound)) {
            return Maps.immutableEntry(nextRange.lowerBound, nextRange);
          } else {
            return endOfData();
          }
        }
      };
    }
    @Override
    public int size() {
      return Iterators.size(entryIterator());
    }
  }
  @Override
  public RangeSet<C> subRangeSet(Range<C> view) {
    return view.equals(Range.<C>all()) ? this : new SubRangeSet(view);
  }
  private final class SubRangeSet extends TreeRangeSet<C> {