GridAxis constructor
      
      GridAxis({ 
    
    
- GridAxisFormat? format,
- TextStyle? textStyle,
- double? margin,
- double? marginStart,
- double? marginEnd,
- PdfColor? color,
- double? width,
- bool? divisions,
- double? divisionsWidth,
- PdfColor? divisionsColor,
- bool? divisionsDashed,
- bool? ticks,
- bool? axisTick,
- double angle = 0,
- GridAxisBuildLabel? buildLabel,
Implementation
GridAxis({
  GridAxisFormat? format,
  this.textStyle,
  this.margin,
  double? marginStart,
  double? marginEnd,
  PdfColor? color,
  double? width,
  bool? divisions,
  double? divisionsWidth,
  PdfColor? divisionsColor,
  bool? divisionsDashed,
  bool? ticks,
  bool? axisTick,
  this.angle = 0,
  this.buildLabel,
})  : format = format ?? _defaultFormat,
      color = color ?? PdfColors.black,
      width = width ?? 1,
      divisions = divisions ?? false,
      divisionsWidth = divisionsWidth ?? .5,
      divisionsColor = divisionsColor ?? PdfColors.grey,
      _marginStart = marginStart ?? 0,
      _marginEnd = marginEnd ?? 0,
      ticks = ticks ?? false,
      _axisTick = axisTick,
      divisionsDashed = divisionsDashed ?? false,
      direction = Axis.horizontal;