Jan

Here is the attempt at providing backward compatibility while allowing custom SVGs. @zsunberg unless you object to this approach, I will clean up, update docs and add tests.

For me, this does not work even if the structure of the module `abc` is flat, without any submodules:   However, it still works with external packages:...

You would need to enable styling in Julia somehow, and then take it over to the javascript side and implement it there. Have a look at https://github.com/sisl/D3Trees.jl/pull/27 where this is...