Use UDrawFrustumComponent in game?

For in-game debugging and for other tools, it would be great to be able to visualize a camera’s frustum. Has anyone done this yet? I see a class UDrawFrustumComponent, used in CameraComponent.h. Is it a simple matter of taking this DrawFrustum member variable outside of the WITH_EDITORONLY_DATA #ifdef? What does that define mean exactly?

Thanks