code: def test_symmetric_img_deduces_symmetric(self):
      plot = self.da_img.hvplot.image()
      plot_opts = Store.lookup_options("bokeh", plot, "plot")
      self.assertEqual(plot_opts.kwargs.get("symmetric"), True)
      style_opts = Store.lookup_options("bokeh", plot, "style")
      self.assertEqual(style_opts.kwargs["cmap"], "coolwarm")
  
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 17 for calling the TestGridPlots obj's underlying member method code with example usage: obj.test_symmetric_img_deduces_symmetric() without return types