code: def test_help_style_compatibility(reset_default_backend):
      # The current backend is plotly but the style options are those of matplotlib
      hvplot.extension(
          "plotly", "matplotlib", compatibility="matplotlib"
      )
      docstring, signature = hvplot._get_doc_and_signature(
          cls=hvplot.hvPlot,
          kind="line",
          completions=False,
          docstring=False,
          generic=False,
          style=True,
          signature=None,
      )
      assert (
          docstring
          == "\nStyle options\n-------------\n\n"
          + "\n".join(
              sorted(Store.registry["matplotlib"][Curve].style_opts)
          )
      )
  
imports: import hvplot.pandas
  import pytest
  from holoviews.core import Store
  from holoviews.element import Curve
label_desc: Use image node_id 3 for calling a global function with example usage: test_help_style_compatibility(reset_default_backend) without return types