nominal N
nominal M


type T[X, Y] = {
	// body
}

type A = T[N, M] // binding X -> N, Y -> M
type B = T[M, N] // binding X -> M, Y -> N

// converted to

type A = ⟨ X -> N, Y -> M ⟩ {
	// body
}
type B = ⟨ X -> M, Y -> N ⟩ {
	// body
}