proposition: Lemma po_homsets_isaprop (PO : po X) (a b : (po_precategory_data PO)) : isaprop (po_precategory_data PO ⟦a,b⟧).
proof: Proof. apply propproperty. Defined.
imports: UniMath.Foundations.HLevels UniMath.Foundations.Sets UniMath.Foundations.Propositions UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence