code: function _addTaskBubble(node, d) {
    var group = node.append('g');
    group.attr('class', 'task-bubble');
    group.append('use').attr('xlink:href', '#task-bubble');
    translateIfIE(group.append('text')
        .text(_trimText(d.get('data.totalTasks') || 0, 3)), 0, 4);
  
    translateIfIE(group, 38, -15);
  }
docs: Add task bubble to a vertex node
  @param node {SVG DOM element} Vertex node
  @param d {VertexDataNode}