anchor.diff:      flSpot1,
       flSpot2,
     ],
  +  shadow: shadow2,
     aboveBarData: barAreaData1,
     belowBarData: barAreaData2,
     gradientFrom: const Offset(0, 0),
  
positive.code:     flSpot1Clone,
      flSpot2,
    ],
    aboveBarData: barAreaData1Clone,
    belowBarData: barAreaData2,
    gradientFrom: const Offset(0, 0),
  
negative.code:     flSpot1,
      flSpot2,
    ],
    shadow: shadow3,
    aboveBarData: barAreaData1,
    belowBarData: barAreaData2,
    gradientFrom: const Offset(0, 0),
  