code: def test_rgb_dataset(self):
      rgb = self.da_rgb.to_dataset(name="z").hvplot.rgb()
      self.assertEqual(
          rgb, RGB(([0, 1], [0, 1]) + tuple(self.da_rgb.values))
      )
  
imports: import os
  import tempfile
  from unittest import SkipTest
  from collections import OrderedDict
  import numpy
  from holoviews import Store
  from holoviews.element import RGB, Image
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 5 for calling the TestGridPlots obj's underlying member method code with example usage: obj.test_rgb_dataset() without return types