Legend
constructor(boxWidth: Int = 40, boxHeight: Int? = null, color: Color? = null, font: ChartFont? = null, padding: Int = 10, generateLabels: (chart: Any) -> Array<LegendItem>? = null, filter: (legendItem: LegendItem, data: ChartData) -> Boolean? = null, sort: (a: LegendItem, b: LegendItem, data: ChartData) -> Number? = null, usePointStyle: Boolean = false, pointStyle: PointStyle? = null, textAlign: LegendLabelAlign? = null)