trying to understand why it doesnt display ce charts

src/Chart.purs

-module Chart
-(
-  histogram2,
-  histogram
-)
-where
+module Chart where
 
 import Prelude
 
@@ -215,7 +210,7 @@ echarts :: forall eff. Array Props -> R.ReactElement
 echarts p = R.createElementDynamic eChartsClass (unsafeFromPropsArray p) []
 
 echarts' :: forall eff. Option -> R.ReactElement
-echarts' opt = R.createElementDynamic eChartsClass2 opt []
+echarts' chart = R.createElementDynamic eChartsClass2 chart []
 
 -- Props
 

src/Dashboard.purs

@@ -18,7 +18,7 @@ performAction :: forall eff props. PerformAction (dom :: DOM | eff) State props
 performAction _ _ _ = pure unit
 
 render :: forall props. Render State props Action
-render dispatch _ state _ = [text "Dashboard", histogram2]
+render dispatch _ state _ = [text "Dashboard", histogram]
 
 layoutDashboard :: forall props eff. Spec (dom :: DOM | eff) State props Action
 layoutDashboard = simpleSpec performAction render