zeB / 2)
    .attr("dy", nodeSizeB / 2 + 1);

cellB.append("text")
    .attr("class", "label")
    .attr("dx", function(d) { return d === "européenne" ? nodeSizeB / 2 + 15 : nodeSizeB / 2; })
    .attr("dy", - 24 - 5)
    .text(function(d) { return d; });

cellB.append("rect")
    .style("opacity", 0)
    .attr("transform", "translate(-" + ((xb.step() - nodeSizeB) / 2) + ",-" + nodeMargin + ")")
    .attr("width", xb.step())
    .attr("height", networkHeightB + (networkMargin - networkHeightB) / 2);
//
// 