ampleKClass(X)
If $X$ is a GKM variety with a distinguished ample equivariant line bundle, this method returns the KClass of the line bundle. If no such line bundle is defined, it allows the user to construct one.
The following example describes the ample line bundle on the Lagrangian Grassmannian $SpGr(2,4)$. The line bundle is precisely the pullback of O(1) under the Plücker embedding $SpGr(2,4) \to \mathbb P^4$.



The object ampleKClass is a method function.