fact: Record fsfun := Fsfun { fmap_of_fsfun : {fmap K -> V}; _ : [forall k : domf fmap_of_fsfun, fmap_of_fsfun k != default (val k)] }.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrnat eqtype ssrfun seq) mathcomp(choice path finset finfun fintype bigop)