TickSpec<D>  constructor 
      const
      TickSpec<D> (
    
- D value, {
- String? label,
- TextStyleSpec? style,
value the value of this tick
label optional label for this tick. If not set, uses the tick formatter
of the axis.
style optional style for this tick. If not set, uses the style of the
axis.
Implementation
const TickSpec(this.value, {this.label, this.style});