How to get Spatial from main class

Hi, I am wondering how you would get the main class’s Spatial (The one extending SimpleApplication). Assuming my main class’s name is Game, getting referenced by game, and I want to get the root Node for attaching a child. I do hypha.getRootNode.attachChild();. How would I do this for the Spatial object?

What do you mean the Spatial object? What do you think a Spatial is?

Never mind, I just realized my mistake. Thanks for the help anyways =D