C3.JS - Need to have separated tooltips for a single stacked bar

The following code shows "one stacked bar" with "one tooltip for all" no matter which of the 3 bars the mouse is over. (see image). Is there a way to build a tooltip for each data group? (in this case I should have 3). If yes what is the code to do it? var chart = [login to view URL]({ padding: { left: 50, right: 50, }, bindto: '#myGraph', data: { columns: [ ['data1', 100], ['data2', 10], ['data3', 50], ], colors: { data1: '#00ff00', data2: '#ff0000', data3: '#00ff00', }, type: 'bar', groups: [ ['data1', 'data2', 'data3'] ], order: false, }, axis: { rotated: true, x: { show: false, }, y: { show: false, } }, zoom: { enabled: true }, legend: { show: false, } });