LinkedHashSet<XAxis> xAxesSet = new LinkedHashSet<InvientChartsConfig.XAxis>();
xAxesSet.add(xAxis);
chartConfig.setXAxes(xAxesSet);
NumberYAxis yAxis = new NumberYAxis();
yAxis.setTitle(new AxisTitle("Nuclear weapon states"));
yAxis.setLabel(new YAxisDataLabel());
yAxis.getLabel().setFormatterJsFunc(
"function() {" + " return this.value / 1000 +'k';" + "}");
LinkedHashSet<YAxis> yAxesSet = new LinkedHashSet<InvientChartsConfig.YAxis>();