code: def test_pattern():
      m = folium.Map([40.0, -105.0], zoom_start=6)
  
      stripes = plugins.pattern.StripePattern(angle=-45)
      stripes.add_to(m)
      circles = plugins.pattern.CirclePattern(
          width=20, height=20, radius=5, fill_opacity=0.5, opacity=1
      )
  
      def style_function(feature):
          default_style = {
              "opacity": 1.0,
              "fillColor": "#ffff00",
              "color": "black",
              "weight": 2,
          }
  
          if feature["properties"]["name"] == "Colorado":
              default_style["fillPattern"] = stripes
              default_style["fillOpacity"] = 1.0
  
          if feature["properties"]["name"] == "Utah":
              default_style["fillPattern"] = circles
              default_style["fillOpacity"] = 1.0
  
          return default_style
  
      data = os.path.join(
          os.path.dirname(__file__), os.pardir, "us-states.json"
      )
      folium.GeoJson(data, style_function=style_function).add_to(m)
  
      out = normalize(m._parent.render())
  
      # We verify that the script import is present.
      script = '<script src="https://teastman.github.io/Leaflet.pattern/leaflet.pattern.js"></script>'  # noqa
      assert script in out
  
imports: import os
  import folium
  from folium import plugins
  from folium.utilities import normalize
label_desc: Use image node_id 1 for calling a global function with example usage: test_pattern() and returns: default_style