code: def test_idxmapping_dimension_labels(self):
      idxmap = MultiDimensionalMapping(
          self.init_item_odict, kdims=[self.dim1, "floatdim"]
      )
      self.assertEqual(
          [d.name for d in idxmap.kdims], self.dimension_labels
      )
  
imports: import numpy
  from holoviews import Dataset, HoloMap
  from holoviews.core import Dimension
  from holoviews.core.ndmapping import MultiDimensionalMapping, NdMapping, UniformNdMapping
  from holoviews.core.overlay import Overlay
  from holoviews.element import Curve
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 8 for calling the NdIndexableMappingTest obj's underlying member method code with example usage: obj.test_idxmapping_dimension_labels() without return types