@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		@SuppressWarnings("unchecked")
		Entry<K,V> other = (Entry<K,V>) obj;
		if (k == null) {
			if (other.k != null)
				return false;
		} else if (!k.equals(other.k))
			return false;
		return true;
	}