docs: def _get_iris_args(attrs):
      """ Converts the xarray attrs into args that can be passed into Iris
      """
      # iris.unit is deprecated in Iris v1.9
      import cf_units
      args = {'attributes': _filter_attrs(attrs, iris_forbidden_keys)}
      args.update(_pick_attrs(attrs, ('standard_name', 'long_name',)))
      unit_args = _pick_attrs(attrs, ('calendar',))
      if 'units' in attrs:
          args['units'] = cf_units.Unit(attrs['units'], **unit_args)
      return args