### Question:
Rule { public int getNumber() { return number; } protected  Rule();  Rule(Sequence lhs, AbstractSequence rhs); Sequence getLhs(); AbstractSequence getRhs(); int getNumber(); Set<Symbol> getTerminals(); @Override String toString(); String toDotString(); int dotLength(); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test public void testInit() { assertFalse(ab_a.getNumber() == ab_cd.getNumber()); }