code: def test_nongeometry(self):
      assert type(self.df["value1"]) is Series
  
imports: from pandas import DataFrame, Series
  from shapely.geometry import Point
  from geopandas import GeoDataFrame, GeoSeries
label_desc: Use image node_id 3 for calling the TestDataFrame obj's underlying member method code with example usage: obj.test_nongeometry() without return types