code: def test_nongeographic_conversion(self):
      converted = Dataset(
          self.cube, kdims=["longitude", "latitude"]
      ).to.curve(["longitude"])
      self.assertTrue(isinstance(converted, HoloMap))
      self.assertEqual(converted.kdims, ["latitude"])
      self.assertTrue(isinstance(converted.last, Curve))
  
file_path: geoviews/geoviews/tests/test_conversions.py
imports: import unittest
  from holoviews.core import HoloMap
  from holoviews.element import Curve
  from geoviews.element import is_geographic, Image, Dataset
  from geoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 4 for calling the TestConversions obj's underlying member method code with example usage: obj.test_nongeographic_conversion() without return types