### Question:
Interval implements java.io.Serializable, Comparable<Interval<T>> { public boolean isLeftOf(int point) { return (end <= point); } Interval(MutableInterval<T> other);  Interval(int begin, int end, T value, int maxEnd); int getBegin(); int getEnd(); T getValue(); int getMaxEnd(); boolean allLeftOf(int point); boolean isLeftOf(int point); boolean isRightOf(int point); boolean contains(int point); boolean overlapsWith(int begin, int end); @Override int hashCode(); @Override boolean equals(Object obj); int compareTo(Interval<T> o); @Override String toString();  }### Answer:
@Test public void testIsLeftOf() { Assert.assertFalse(interval.isLeftOf(8)); Assert.assertFalse(interval.isLeftOf(9)); Assert.assertTrue(interval.isLeftOf(10)); Assert.assertTrue(interval.isLeftOf(11)); }