fact: Definition rinvunitor_invertible_2cell {B : bicat} {a b : B} (f : a --> b) : invertible_2cell f (f · id₁ b).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.Bicategories.Core.Bicat