support D3 zoom event?

[learncurve]

Hi, I checked your API document at http://jettro.github.io/c3-angular-directive/api-docs/1.3/index.html,
it can support enable-zoom feature, but is there anyway that I can use those D3 zoom functions at https://github.com/d3/d3-zoom/blob/master/README.md#zoom_on ?

I mean if currently your C3chart did not provide those zoom directive, then could I use sth. like d3.select(*) to get the C3chart and invoke the d3 zoom function?

many thanks for your guidance and appreciated very much.