return this.definitelyNullSet.equals(other.definitelyNullSet);
return this.contents.equals(other.contents);
	public boolean equals(Object obj) {		if (obj == null || obj.getClass() != this.getClass()) {			return false;		}				DefinitelyNullSet other = (DefinitelyNullSet) obj;		return this.definitelyNullSet.equals(other.definitelyNullSet);	}