@Override
        public ColumnChartData getColumnChartData() {
            return ComboLineColumnChartView.this.data.getColumnChartData();
        }
ComboChart, supports ColumnChart combined with LineChart. Lines are always drawn on top.

@author Leszek Wach
hellocharts-library/src/lecho/lib/hellocharts/view/ComboLineColumnChartView.java