SSH Proxy using guacd

[Jamie Love]

Hi there,
I'm fairly sure the answer is to extend the existing SSH backend to guacd, 
however I was wondering if it was possible to set up guacd to ssh to a remote 
server via a proxy host. The equivalent of this setup in a ~/.ssh/config file:

Host server-a
    HostName 192.168.10.19
    User usera

Host server-b
    HostName 10.3.80.40
    ProxyJump server-a
    User usera


Thanks