code: def test_color_categories():
      domain_values = [
          "Multi-Family Walk-Up Buildings",
          "Multi-Family Elevator Buildings",
          "Mixed Residential And Commercial Buildings",
          "Parking Facilities",
          "1 and 2 Family Buildings",
          "Commercial and Office Buildings",
          "Vacant Land",
          "Public Facilities and Institutions",
          "Transportation and Utility",
          "Open Space and Outdoor Recreation",
          "Industrial and Manufacturing",
      ]
  
      assert color_categories(
          attr="landuse_type", domain=domain_values, colors="Bold"
      ).serialize() == {
          "@@function": "colorCategories",
          "attr": "landuse_type",
          "domain": domain_values,
          "colors": "Bold",
          "nullColor": [204, 204, 204],
          "othersColor": [119, 119, 119],
      }
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_color_categories() without return types