More Complex SSH Config Support ?

[violin0622]

What method does spray use when login into target host?   
Does it simulate an interactive command line, like a expect ?
Or using a language-specific SSH client SDK ? 
Or does it just depend on how Ansible behaves? 

My issue is that in our DC environments,
server have to use a complex SSH config including ProxyCommand and RemoteCommand to login into other server and switch to the root user.
How to make kuboard-spary be aware of the config ?