Proton-J SSL configuration

[Beekwilder, Norm]

Hi,
  I'm using Proton-J 0.33.6 for a Java 8 client application. I have a security 
requirement to restrict which cipher suites are used when connecting. However, 
other than using Proton.sslDomain().setSslContext(SSLContext) I'm having 
trouble figuring out how to configure the SSL connection. I would prefer a 
programmatic solution if one exists but am willing to investigate other options 
too.
Thanks
Norm