code: def test_explorer_save(tmp_path):
      explorer = hvplot.explorer(df)
  
      explorer.param.update(
          kind="scatter",
          x="bill_length_mm",
          y_multi=["bill_depth_mm"],
      )
  
      outfile = tmp_path / "plot.html"
  
      explorer.save(outfile)
  
      assert outfile.exists()
  
imports: import re
  from textwrap import dedent
  import holoviews
  import pandas
  import hvplot.pandas
  import hvplot.xarray
  import xarray
  import pytest
  from bokeh.sampledata import penguins
  from hvplot.ui import hvDataFrameExplorer, hvGridExplorer
label_desc: Use image node_id 5 for calling a global function with example usage: test_explorer_save(tmp_path) without return types