dc.js pieChart slice move

I would like to move dc.js pieChart slices outward when they are selected.

I want to do basically this when a pie slice is selected:

var arcOver = d3.svg.arc()
    .outerRadius(outerRadius + 10)
    .innerRadius(innerRadius + 10);

I would like to have that as default behaviour in dc.js.

Any idea which function in dc.js to change to get the desired effect?