fact: Definition make_invertible_2cell {C : prebicat_data} {a b : C} {f g : C⟦a,b⟧} {η : f ==> g} (inv_η : is_invertible_2cell η) : invertible_2cell f g := η,, inv_η.
imports: UniMath.Tactics.EnsureStructuredProofs UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.PrecategoryBinProduct