fact: Definition op1_2cell_struct (C : prebicat_1_id_comp_cells) : prebicat_2cell_struct (opp_precat_data C) := λ (a b : C) (f g : C ⟦ b, a ⟧), f ==> g.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.PrecategoryBinProduct UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Morphisms.Adjunctions