code: def setUp(self):
      super().setUp()
  
      self.nodes = [(0, 0, 0), (0.5, 1, 1), (1.0, 0, 2), (1.5, 1, 3)]
      self.simplices = [(0, 1, 2, 0), (1, 2, 3, 1)]
      self.trimesh = TriMesh((self.simplices, self.nodes))
      self.trimesh_weighted = TriMesh(
          (self.simplices, self.nodes), vdims="weight"
      )
  
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 TestBokehTriMeshPlot obj's underlying member method code with example usage: obj.setUp() without return types