Selection API should not interfere with mouse hover

I'm trying to implement selection in the bar chart by calling `select` method on click:

```
chart.on("click", function(e, data) {
chart.select({ key: "ZIP_CODE", value: data["ZIP_CODE"] });
});
```

This does not work because Cedar is clearing selection on mouse-out. Is there a way to persist the selection so that the clicked bar remains selected even after user moves the mouse out of it?