@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Edge other = (Edge) obj;
		if (dest == null) {
			if (other.dest != null)
				return false;
		} else if (!dest.equals(other.dest))
			return false;
		if (source == null) {
			if (other.source != null)
				return false;
		} else if (!source.equals(other.source))
			return false;
		return true;
	}