How to check if WordPress object type is already extended by pods

It turns out that Pods handles this exactly as you would expect.

It doesn’t differentiate between completely new post types and extending post types in the Pods API.

To check if the WP_User class is being extended by pods, the method is identical:

// pods() returns false if there's no extended class for `user`
if ( !pods('user') ) { 
    // Do things if there's no extended User set up in Pods
}