\tparam PacketType packet of which the key is requested
\returns key of the packet wrapped in a <a
- href="http://www.boost.org/libs/optional/doc/optional.html">boost::optional</a> or
+ href="http://www.boost.org/doc/libs/release/libs/optional/index.html">boost::optional</a> or
an unbound optional, if the key is not found.
*/
template <class PacketType>
\param packet The packet of which the key is requested
\returns key of the packet wrapped in a <a
- href="http://www.boost.org/libs/optional/doc/optional.html">boost::optional</a> or
+ href="http://www.boost.org/doc/libs/release/libs/optional/index.html">boost::optional</a> or
an unbound optional, if the key is not found.
*/
static typename boost::optional<typename Tag::key_t> key(Packet const & packet, NoThrow_t);