filterCallGraphFn :: VarDecl -> Bool
filterCallGraphFn =
  (`elem` (map fst A.stack_limits)) . declString
filterCallGraphFn :: VarDecl -> Bool
filterCallGraphFn =
  (`elem` (map fst A.stack_limits)) . declString
filterCallGraphFn =
  (`elem` (map fst A.stack_limits)) . declString