∀ (J : Type u_1) (X : (CategoryTheory.Limits.WidePullbackShape J)ᵒᵖ),
  CategoryTheory.CategoryStruct.comp
      ((CategoryTheory.Limits.widePullbackShapeUnop J).map
        ((CategoryTheory.Limits.widePullbackShapeOpUnop J).symm.hom.app X))
      ((CategoryTheory.Limits.widePushoutShapeUnopOp J).hom.app
        ((CategoryTheory.Limits.widePullbackShapeUnop J).obj X)) =
    CategoryTheory.CategoryStruct.id ((CategoryTheory.Limits.widePullbackShapeUnop J).obj X)