var drawXLabelForEveryXElement: Int = 1
var gradientColors: [CGColor]
var selectedCircleLineWidth: CGFloat = 3.0
var selectedCircleRadius: CGFloat = 10.0
var circleRadius: CGFloat = 7.0
var lineWidth: CGFloat = 3.0
var legendFont = UIFont.systemFont(ofSize: UIFont.systemFontSize)
var shouldDrawCircleForEachData = false
var legendTextColor = UIColor.black

var margin: CGFloat = 20
var marginTop: CGFloat = 10
var marginRight: CGFloat = 0
var marginBottom: CGFloat = 20
var marginLeft: CGFloat = 40

func setMargin(top: CGFloat, right: CGFloat, bottom: CGFloat, left: CGFloat)
var paddingTopLine: CGFloat = 10
var paddingBottomLine: CGFloat = 10

var dataSource: UIStatisticViewDataSource? = nil
var delegate: UIStatisticViewDelegate? = nil

func reloadData()
func viewDidLayoutSubviews()

func statisticView(_ statisticView: UIStatisticLineChartView, didSelectedIndexindex: Int)
func statisticView(_ statisticView: UIStatisticLineChartView, isSelecting: Bool)

func dataToDisplay(in statisticView: UIStatisticLineChartView) -> [CGFloat]
func legendX(for statisticView: UIStatisticLineChartView) -> [String]
func legendY(for statisticView: UIStatisticLineChartView) -> [String]