EndPointsTimeAxisSpec constructor
      const
      EndPointsTimeAxisSpec({ 
    
- RenderSpec<DateTime> ? renderSpec,
- DateTimeTickProviderSpec? tickProviderSpec,
- DateTimeTickFormatterSpec? tickFormatterSpec,
- bool? showAxisLine,
- DateTimeExtents? viewport,
Creates a AxisSpec that specialized for timeseries charts.
renderSpec spec used to configure how the ticks and labels
    actually render. Possible values are GridlineRendererSpec,
    SmallTickRendererSpec & NoneRenderSpec. Make sure that the 
Implementation
const EndPointsTimeAxisSpec({
  RenderSpec<DateTime>? renderSpec,
  DateTimeTickProviderSpec? tickProviderSpec,
  DateTimeTickFormatterSpec? tickFormatterSpec,
  bool? showAxisLine,
  DateTimeExtents? viewport,
}) : super(
          renderSpec: renderSpec ??
              const SmallTickRendererSpec<DateTime>(
                  labelAnchor: TickLabelAnchor.inside,
                  labelOffsetFromTickPx: 0),
          tickProviderSpec:
              tickProviderSpec ?? const DateTimeEndPointsTickProviderSpec(),
          tickFormatterSpec: tickFormatterSpec,
          showAxisLine: showAxisLine,
          viewport: viewport);