code: def test_chord_nodes_label_text(self):
      g = self.chord.opts(label_index="Label")
      plot = bokeh_renderer.get_plot(g)
      source = plot.handles["text_1_source"]
      self.assertEqual(source.data["text"], ["A", "B", "C"])
  
imports: import numpy
  from bokeh.models import EdgesAndLinkedNodes, NodesAndLinkedEdges, NodesOnly, Patches
  from bokeh.models.mappers import CategoricalColorMapper, LinearColorMapper
  from holoviews.core.data import Dataset
  from holoviews.element import Chord, Graph, Nodes, TriMesh, VLine, circular_layout
  from holoviews.plotting.bokeh.util import property_to_dict
  from holoviews.util.transform import dim
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 4 for calling the TestBokehChordPlot obj's underlying member method code with example usage: obj.test_chord_nodes_label_text() without return types