fact: Definition is_left_extension_weq_is_right_extension_co {B : bicat} {x y z : B} (f : x --> z) (g : x --> y) {h : y --> z} (τ : g · h ==> f) : is_right_extension f g τ ≃ @is_left_extension (op2_bicat B) x y z f g h τ.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Examples.OpMorBicat UniMath.Bicategories.Core.Examples.OpCellBicat