@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (!super.equals(obj))
			return false;
		if (this.getClass() != obj.getClass())
			return false;
		final RegExBetween other = (RegExBetween) obj;
		if (this.begin == null) {
			if (other.begin != null)
				return false;
		} else if (!this.begin.equals(other.begin))
			return false;
		if (this.end == null) {
			if (other.end != null)
				return false;
		} else if (!this.end.equals(other.end))
			return false;
		return super.equals(obj);
	}