Helper Description
Chart(widthheight [, template] [, templatePath]) Initializes a chart.
Chart.AddLegend([title] [, name]) Adds a legend to a chart.
Chart.AddSeries([name] [, chartType] [, chartArea]
  [, axisLabel] [, legend] [, markerStep] [, xValue]
  [, xField] [, yValues] [, yFields] [, options])
Adds a series of values 



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