class_docstr: Test for the MultiInterface and GeomDictInterface.
code: def test_multi_geom_line_string_length(self):
      geoms = [
          {"geometry": sgeom.LineString([(0, 0), (3, 3), (6, 0)])},
          {"geometry": sgeom.LineString([(3, 3), (9, 3), (6, 0)])},
      ]
      mds = Dataset(geoms, kdims=["x", "y"], datatype=[self.datatype])
      self.assertEqual(len(mds), 2)
  
imports: from unittest import SkipTest
  import numpy
  import pandas
  from holoviews.core.data import Dataset, MultiInterface
  from holoviews.core.data.interface import DataError
  from holoviews.element import Polygons, Path
  from holoviews.element.comparison import ComparisonTestCase
  from holoviews.tests.core.data.test_multiinterface import MultiBaseInterfaceTest
  from geoviews.data.geom_dict import GeomDictInterface
label_desc: Use image node_id 11 for calling the GeomInterfaceTest obj's underlying member method code with example usage: obj.test_multi_geom_line_string_length() without return types