code: def mask(self, mask_fixture_name, request):
      return request.getfixturevalue(mask_fixture_name)
  
imports: import numpy
  import shapely
  from shapely.geometry import Polygon, Point, LineString, LinearRing, GeometryCollection, MultiPoint, box
  import geopandas
  from geopandas import GeoDataFrame, GeoSeries, clip
  from geopandas.testing import assert_geodataframe_equal, assert_geoseries_equal
  import pytest
  from geopandas.tools.clip import _mask_is_list_like_rectangle
label_desc: Use image node_id 1 for calling the TestClipWithSingleRectangleGdf obj's underlying member method code with example usage: obj.mask(mask_fixture_name, request) and returns: request