code: def setUp(self):
      super().setUp()
      self.edges = [(0, 1, 1), (0, 2, 2), (1, 2, 3)]
      self.nodes = Dataset(
          [(0, "A"), (1, "B"), (2, "C")], "index", "Label"
      )
      self.chord = Chord((self.edges, self.nodes))
  
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 1 for calling the TestBokehChordPlot obj's underlying member method code with example usage: obj.setUp() without return types