fact: Definition kfinstruct_coprod {X Y : UU} : kfinstruct X → kfinstruct Y → kfinstruct (X ⨿ Y).
imports: UniMath.Foundations.Propositions UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Notations UniMath.Combinatorics.FiniteSets UniMath.Combinatorics.StandardFiniteSets