Updating an elements draw method in v3

[mattgreenfield]

This example uses Chart.elements.Arc.prototype.draw = function() {` to overide the default and draw its own bars with a space between them
See line 5 https://codepen.io/gmattgreenfield/pen/YzxmvpZ

However it is using chartJS v2. I can't seem to find how I would do this with v3.

Any help would be much appreciated.
Thanks

[mattgreenfield]

I've found the answer.
To override a charts Draw method, you must extend the chart class like this https://www.chartjs.org/docs/latest/developers/charts.html#extending-existing-chart-types