private static AbstractDataTable createMemTable(RuntimeSystemInfo sysInfo) {
DataTable data = DataTable.create();
data.addColumn(ColumnType.STRING, "Memory Usage");
data.addColumn(ColumnType.NUMBER, "Percentage");
data.addRows(2);
data.setValue(0, 0, "Free");
data.setValue(0, 1, sysInfo==null ? 0 : sysInfo.getFreeMemory());
data.setValue(1, 0, "Used");
data.setValue(1, 1, sysInfo==null ? 0 : sysInfo.getMaxMemory() - sysInfo.getFreeMemory());
return data;