fact: Definition vcomp2 {C : two_cat_data} {a b : C} {f g h : C⟦a, b⟧} : f ==> g → g ==> h → f ==> h := λ x y, pr1 (pr222 C) _ _ _ _ _ x y.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Univalence