IMidiMapping on IComponent or IEditController

Developer VST 3 SDK
1

Is IMidiMapping supposed to be on IComponent or IEditController?

Most plugins its on IComponent but i’ve just discovered FabFilter have put it on IEditController

2

IMidiMapping extends IEditController: [3.0.1] Parameter MIDI Mapping - VST 3 Developer Portal (steinbergmedia.github.io).

but when the plug-in is a single component (controller and processor supported by the same instance) (see VST 3 API Documentation - VST 3 Developer Portal (steinbergmedia.github.io)), IMidiMapping is then part of IComponent.