Index: packages/charted/lib/charts/chart_state.dart |
diff --git a/packages/charted/lib/charts/chart_state.dart b/packages/charted/lib/charts/chart_state.dart |
index 3b05e84e80e207bc1e087ef9bdad11ae54a9d5b6..ce9de9915977a121903e3388284b0ef857bcb45f 100644 |
--- a/packages/charted/lib/charts/chart_state.dart |
+++ b/packages/charted/lib/charts/chart_state.dart |
@@ -12,7 +12,7 @@ part of charted.charts; |
/// Model to provide highlight, selection and visibility in a ChartArea. |
/// Selection and visibility |
/// |
-abstract class ChartState implements ChangeNotifier { |
+abstract class ChartState implements Observable { |
static int COL_SELECTED = 0x001; |
static int COL_UNSELECTED = 0x002; |
static int COL_PREVIEW = 0x004; |