# connection
@main[]
$m[^memcached::open[$server]]
$m.pa_s[connect string]
1. connect string: $m.pa_s
$m[^memcached::open[ $.server[$server] ]]
2. options hash: $m.pa_s
3. refused: ^failed{^memcached::open[127.0.0.1:1]}
$lazy[^memcached::open[ $.server[127.0.0.1:1] $.skip-connect(true) ]]
4. skip-connect: opened, ^failed{$v[$lazy.pa_s]}
5. empty options: ^failed{^memcached::open[ $.skip-connect(true) ]}
$empty[]
6. empty connect string: ^failed{^memcached::open[$empty]}
^m.release[]
7. used after release: $m.pa_s
^m.open[$server]
8. reopened: $m.pa_s
$t[^memcached::open[$server](60)]
$t.pa_d[default expiration]
9. default expiration: $t.pa_d
^m.delete[pa_s]^m.delete[pa_d]