LegendCellPadding.fromLTRBPct constructor
      const
      LegendCellPadding.fromLTRBPct()
     
    
Creates padding in percents from the left, top, right, and bottom.
Implementation
const LegendCellPadding.fromLTRBPct(
  this.leftPct,
  this.topPct,
  this.rightPct,
  this.bottomPct,
)   : leftPx = null,
      topPx = null,
      rightPx = null,
      bottomPx = null;