Unreal Engine 4 (UE4) How to create a get or set (getter or setter) a reference of a component in the class blueprint - ctrl drag is get - alt drag is set

The get version of a component brings the component and feature set onto the class blueprint graph. The set version of a component allows that component to be replaced by another component. When dragging a component to the graph, hold down the ctrl to get a get version of that component. Hold down the alt when dragging the component to the graph to get the set version of that component.