Event details should be unwrapped

[andrey-zakharov]

Let see for example to plotly_relayout. This event fires with additinal details: layout js object
It comes to dart layer unwrapped. Layout Object designed to be same that accepted by plotly.relayout method itself. https://plot.ly/javascript/plotlyjs-function-reference/#plotly-relayout
Thus i can catch event from one chart and pass to relayout another.
It doesn't work because dart's version of relayout method tries to wrap it back to JS. But its already JSObject.
So, currently, I have workaround, but its seems a design flow.