docs: def _check_arg(self, arg):
          """ Check individual argument (list/tuple/string/etc) """
          if isinstance(arg, list):
              return self._get_dependencies_from_args(arg)
          elif isinstance(arg, dict):
              return self._get_dependencies_from_kwargs(arg)
  
          if not is_dependency_name(arg):
              return set()
          return set([arg[1:]])