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-rw-r--r--src/chart/dual_coord.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/chart/dual_coord.rs b/src/chart/dual_coord.rs
index 9138f65..d5960e0 100644
--- a/src/chart/dual_coord.rs
+++ b/src/chart/dual_coord.rs
@@ -32,6 +32,7 @@ pub struct DualCoordChartContext<'a, DB: DrawingBackend, CT1: CoordTranslate, CT
/// The chart state for a dual coord chart, see the detailed description for `ChartState` for more
/// information about the purpose of a chart state.
/// Similar to [ChartState](struct.ChartState.html), but used for the dual coordinate charts.
+#[derive(Clone)]
pub struct DualCoordChartState<CT1: CoordTranslate, CT2: CoordTranslate> {
primary: ChartState<CT1>,
secondary: ChartState<CT2>,