* AnchorRef holds a ref to the anchor DOM element and draw history data. * In the old code, Anchor was a React class component with instance methods.

* InspectorManager holds all mutable state that the inspector uses. * It extends Visitor to hook into the gl-react draw lifecycle. * Components subs

* copy pixel with a linear interpolation * @prop {any} children content to render

* copy pixel with no interpolation (nearest pixel) * @prop {any} children content to render