Question About Locating The"show Menu" Script

Can any one tell me where I can find the script that creates the "Show" menu in the main model pane window. I need to incorporate its contents and functions into a custom UI.

View Shading Lighting Show Panels


I can't find anything in the Alisa/Maya/Scripts/Startup

Does anyone no where to find this?

scripts/others/createModelPanelMenu.mel not so supprising name eh.