fact: Definition isweqfrom2cellto2cellalt {XX YY : algebra_ob P} (ff gg : algebra_mor P XX YY) : isweq (from2cellto2cellalt ff gg).
imports: UniMath.Foundations.All UniMath.Induction.PolynomialFunctors UniMath.CategoryTheory.Core.Functors UniMath.Induction.FunctorAlgebras_legacy