code: def test_axis_set_to_none_in_holoviews_opts_default(
      self, df, backend
  ):
      hv.opts.defaults(hv.opts.Scatter(xaxis=None, yaxis=None))
      plot = df.hvplot.scatter("x", "y", c="category")
      opts = Store.lookup_options(backend, plot, "plot")
      assert opts.kwargs["xaxis"] is None
      assert opts.kwargs["yaxis"] is None
  
imports: import hvplot
  import holoviews
  import numpy
  import pandas
  import pytest
  import xarray
  from holoviews import Store
  from holoviews.core.options import Options, OptionTree
label_desc: Use image node_id 18 for calling the TestOptions obj's underlying member method code with example usage: obj.test_axis_set_to_none_in_holoviews_opts_default(df, backend) without return types