fact: Definition functorial_morphism_of_morphism_of s d (m : morphism (S / T) s d) : morphism (S' / T') (functorial_morphism_of_object_of s) (functorial_morphism_of_object_of d).
imports: Functor.Core NaturalTransformation.Core Functor.Composition.Core NaturalTransformation.Composition.Core NaturalTransformation.Composition.Laws Functor.Paths Category.Strict HoTT.Tactics PathGroupoids Types.Forall