isEmpty : Ref Ctxt Defs => Defs -> Env Term vars -> NF vars -> Core BoolgetMissing : Ref Ctxt Defs => FC -> Name -> ClosedTerm -> CaseTree vars -> Core (List ClosedTerm)getNonCoveringRefs : Ref Ctxt Defs => FC -> Name -> Core (List Name)checkMatched : Ref Ctxt Defs => Bool -> List Clause -> ClosedTerm -> Core (Maybe ClosedTerm)