Index: packages/charted/lib/charts/data_transformers/aggregation_transformer.dart |
diff --git a/packages/charted/lib/charts/data_transformers/aggregation_transformer.dart b/packages/charted/lib/charts/data_transformers/aggregation_transformer.dart |
index 0c5af4fb259985328b852de8625a5e4051d0d8a9..4716cdb99b9042cb3cbea6cd2cbc397cc59f7ccc 100644 |
--- a/packages/charted/lib/charts/data_transformers/aggregation_transformer.dart |
+++ b/packages/charted/lib/charts/data_transformers/aggregation_transformer.dart |
@@ -18,7 +18,7 @@ part of charted.charts; |
/// The output column will be re-ordered first by the indices specified in the |
/// dimension column indices then by the facts column indices. The data in the |
/// cells of each row will also follow this rule. |
-class AggregationTransformer extends ChangeNotifier |
+class AggregationTransformer extends Observable |
implements ChartDataTransform, ChartData { |
static const String AGGREGATION_TYPE_SUM = 'sum'; |
static const String AGGREGATION_TYPE_MIN = 'min'; |