fact: Axiom UnfoldDatagroup_rac_def: forall p h ep dg f, LocSet.In f (UnfoldDatagroup_rac p h ep dg) <-> FieldInDg_rac p h ep f dg.
imports: Coq(List) JML(Stack) Coq(ListSet) Coq(Bool) Coq(ZArith) Coq(Relation_Operators) JML(ListHelpers) Coq(Classical)