code: public boolean after(final Interval<C> that) {
          if(this.hasNone() || that.hasNone()) {
              return false;
          }
          return that.before(this);
      }
docs: Test if an interval is after another.
  @param that interval
  @return true if that interval (upper endpoint) is before this (lower
  endpoint)
  @see #before(org.nmdp.ngs.fca.Interval)