Thanks for answer, Dharani, but I need a little different, something like this:
final List<SampleData> sampleData = <SampleData>[
SampleData('name1', 50),
SampleData('name2', 25),
SampleData('name3', 42), //that all is first chart, every new SampleData, new chart on yAxis
SampleData('name4', 13),
SampleData('name5', 20),
];
final List<SampleData> sampleData2 = <SampleData>[
SampleData('name1', 40),
SampleData('name2', 30),
SampleData('name3', 20), // that all is second chart
SampleData('name4', 10),
SampleData('name5', 20),
];
final List<ChartSample> chartData = <ChartSample>[
ChartSample(1, sampleData),
ChartSample(2, sampleData2),
];