public Map<String, UserTunnel> getTunnels() {
        this.access();
        return tunnels;
    }
Returns a map of all active tunnels associated with this session, where
each key is the String representation of the tunnel's UUID. Changes to
this map immediately affect the set of tunnels associated with this
session. A tunnel need not be present here to be used by the user
associated with this session, but tunnels not in this set will not
be taken into account when determining whether a session is in use.
Invoking this function automatically updates this session's last access
time.

@return
    A map of all active tunnels associated with this session.
guacamole/src/main/java/org/apache/guacamole/GuacamoleSession.java