anchor.diff:  import 'package:fl_chart/fl_chart.dart';
   import 'package:fl_chart/src/chart/base/axis_chart/axis_chart_painter.dart';
  +import 'package:fl_chart/src/chart/base/base_chart/base_chart_painter.dart';
   import 'package:fl_chart/src/utils/canvas_wrapper.dart';
   import 'package:flutter/material.dart';
   import 'package:flutter/widgets.dart';
  
positive.code:       while (verticalSeek <= data.maxY) {
          if (leftTitles.checkToShowTitle(
              data.minY, data.maxY, leftTitles, leftInterval, verticalSeek)) {
            var x = 0 + getLeftOffsetDrawSize();
            var y = getPixelY(verticalSeek, viewSize);
  
            final text = leftTitles.getTitles(verticalSeek);
  
  
negative.code:               text: span,
                textAlign: TextAlign.center,
                textDirection: TextDirection.ltr,
                textScaleFactor: holder.textScale);
            tp.layout();
  
            x -= tp.width / 2;
  