{0, "=B1*2", "=C1*2", "=D1*2", "=E1*4"}
};
public void testFormulaCache() {
Workbook wb = new XSSFWorkbook();
Sheet sheet = new SheetBuilder(wb, plotData).build();
Drawing drawing = sheet.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 1, 1, 10, 30);
Chart chart = drawing.createChart(anchor);
ChartAxis bottomAxis = chart.getChartAxisFactory().createValueAxis(AxisPosition.BOTTOM);