code: def test_define_custom_method(self):
      hvplot = hvPlotTabular(
          self.df, {"custom_scatter": {"width": 42, "height": 42}}
      )
      custom_scatter = hvplot.custom_scatter(y="y")
      scatter = hvplot.scatter(y="y")
      custom_opts = Store.lookup_options(
          "bokeh", custom_scatter, "plot"
      )
      opts = Store.lookup_options("bokeh", scatter, "plot")
      self.assertEqual(custom_opts.options.get("width"), 42)
      self.assertEqual(custom_opts.options.get("height"), 42)
      self.assertNotEqual(opts.options.get("width"), 42)
      self.assertNotEqual(opts.options.get("height"), 42)
  
imports: from collections import OrderedDict
  import numpy
  import pandas
  import xarray
  from hvplot.plotting import hvPlot, hvPlotTabular
  from holoviews import Store, Scatter
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 3 for calling the TestOverrides obj's underlying member method code with example usage: obj.test_define_custom_method() without return types