IntervalSet implements TimeSet<Interval> { @Override public boolean remove(Interval interval) { return removeInner(interval.getLow(), interval.getHigh()) >= 0; } IntervalSet();  IntervalSet(int capacity);  IntervalSet(double[] arr); @Override boolean add(Interval interval); @Override boolean remove(Interval interval); @Override int size(); @Override boolean isEmpty(); boolean contains(double timestamp); @Override boolean contains(Interval interval); double[] getIntervals(); @Override Interval[] toArray(); @Override Object toPrimitiveArray(); @Override void clear(); @Override int hashCode(); @Override boolean equals(Object obj); @Override String toString(TimeFormat timeFormat, DateTimeZone timeZone); @Override String toString(TimeFormat timeFormat); @Override String toString();  }
@Test public void testRemoveEmpty() { IntervalSet set = new IntervalSet(); Assert.assertFalse(set.remove(new Interval(0.0, 1.0))); }