code: def test_display_vector_HeatmapViz(display, data):
      """Assert that show calls the mocked display function"""
      viz = HeatmapViz(
          [],
          vector_url="mapbox://rsbaumann.2pgmr66a",
          vector_layer_name="healthcare-points-2yaw54",
          vector_join_property="Provider Id",
          data_join_property="Provider Id",
          weight_property="Avg Medicare Payments",
          weight_stops=[[10, 0], [100, 1]],
          color_stops=[[0, "red"], [0.5, "blue"], [1, "green"]],
          radius_stops=[[0, 1], [12, 30]],
          access_token=TOKEN,
      )
      viz.show()
      display.assert_called_once()
  
imports: import os
  import json
  import base64
  import random
  from mock import patch
  import pytest
  from mapboxgl.viz import *
  from mapboxgl.errors import TokenError, LegendError
  from mapboxgl.utils import create_color_stops, create_numeric_stops
  from matplotlib.pyplot import imread
label_desc: Use image node_id 22 for calling a global function with example usage: test_display_vector_HeatmapViz(display, data) without return types