fact: Definition get_ver_left_unitor {C: predoublecategory_sq_hor_ver_unit_assoc_data} {a b : C} (f: a -v-> b) : sqq_iso_special (ver_identity a ·v f) f := (pr12 C) a b f.
imports: UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Notations UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Univalence