    cellView.findBySelector([selector, root, selectors])

Return an array of subelements of this CellView which are identified by `selector`. If no such subelements are found, return an empty array.

This method mimics jQuery element search methods in that it always returns an array. If you are only expecting to find a single subelement (most common scenario), you can get it by accessing the first element in the returned array – e.g. `this.findBySelector('body')[0]`.

If you do not specify a `selector`, the `root` of the CellView is returned as the only element of the return array. For backwards compatibility, the same applies also if you provide the special value `selector = '.'`. By default `root = this.el` (the wrapping `<g>` SVGElement of the CellView), but if you provide a different `root` (see below), then that value is returned instead.

By default, JointJS searches for matching subelements among descendants of `this.el` SVGElement. As an advanced feature, you may provide a different `root` – e.g. an `el` SVGElement of another CellView. Then JointJS searches for matching subelements among the descendants of that SVGElement.

By default, JointJS uses `this.selectors` array for reference. (The `selectors` array is a cached structure of this CellView's SVGElement descendants as defined by the `markup` attribute of the Cell model from which the CellView was initialized.) As an advanced feature, you may provide a different `selectors` array for the search – e.g. a `selectors` array of another CellView.

(Deprecated) For backwards compatibility, if no matching subelement is found among `selectors`, then jQuery is used to try and find an element through CSS selectors (`$(root).find(selector).toArray()`). If you are using standard shapes, you may disable this functionality for increased performance by setting `useCSSSelectors = false` in the global config.