Remove assertion to check to provide only one of color or gradient property in the BarChartRodData and BackgroundBarChartRodData, imaNNeo#1121.

Author: imaNNeo

CHANGELOG.md

@@ -1,3 +1,6 @@
+## newVersion
+* **IMPROVEMENT** (by @imaNNeo) Remove assertion to check to provide only one of `color` or `gradient` property in the [BarChartRodData](https://github.com/imaNNeo/fl_chart/blob/master/repo_files/documentations/bar_chart.md#barchartroddata) and [BackgroundBarChartRodData](https://github.com/imaNNeo/fl_chart/blob/master/repo_files/documentations/bar_chart.md#backgroundbarchartroddata), #1121.
+
 ## 0.60.0
 * **IMPROVEMENT** (by @lsaudon) Replace flutter_lints by very_good_analysis
 * **BREAKING** (by @lsaudon) Update dart sdk to 2.17.0 (flutter 3.0.0)

lib/src/chart/bar_chart/bar_chart_data.dart

@@ -333,14 +333,7 @@ class BarChartRodData with EquatableMixin {
  borderRadius = Utils().normalizeBorderRadius(borderRadius, width ?? 8),
  borderSide = Utils().normalizeBorderSide(borderSide, width ?? 8),
  backDrawRodData = backDrawRodData ?? BackgroundBarChartRodData(),
- rodStackItems = rodStackItems ?? const [] {
- assert(
- (gradient == null && this.color != null) ||
- (this.color == null && gradient != null),
- 'You cannot provide both color and gradient at the same time, '
- 'color is ${this.color} and gradient is $gradient',
- );
- }
+ rodStackItems = rodStackItems ?? const [];
 
  /// [BarChart] renders rods vertically from [fromY].
  final double fromY;
@@ -533,14 +526,7 @@ class BackgroundBarChartRodData with EquatableMixin {
  toY = toY ?? 0,
  show = show ?? false,
  color = color ??
- ((color == null && gradient == null) ? Colors.blueGrey : null) {
- assert(
- (gradient == null && this.color != null) ||
- (this.color == null && gradient != null),
- 'You cannot provide both color and gradient at the same time, '
- 'color is ${this.color} and gradient is $gradient',
- );
- }
+ ((color == null && gradient == null) ? Colors.blueGrey : null);
 
  /// Determines to show or hide this
  final bool show;