public static boolean fastSubclassOfP(Stella_Class subclass, Stella_Class superclass) {
    { int sublabel = subclass.classTaxonomyNode.label;

      { Interval interval = null;
        Cons iter000 = superclass.classTaxonomyNode.intervals;

        for (;!(iter000 == Stella.NIL); iter000 = iter000.rest) {
          interval = ((Interval)(iter000.value));
          if ((sublabel >= interval.lowerBound) &&
              (sublabel <= interval.upperBound)) {
            return (true);
          }
        }
      }
      return (false);
    }
  }