∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {A B : CategoryTheory.Functor Cᵒᵖ (Type v)}
  (P : CategoryTheory.Limits.IndObjectPresentation A) (η : A ⟶ B) [inst_1 : CategoryTheory.IsIso η]
  (s : CategoryTheory.Limits.Cocone (P.F.comp CategoryTheory.yoneda)) (X : Cᵒᵖ) (a : (P.cocone.extend η).pt.obj X),
  ((P.extend η).isColimit.desc s).app X a = (P.coconeIsColimit.desc s).app X (CategoryTheory.inv (η.app X) a)