code: def test_highlight(self):
      m = self.nybb.explore(highlight=True)
      out_str = self._fetch_map_string(m)
  
      assert '"fillOpacity":0.75' in out_str
  
      m = self.nybb.explore(
          highlight=True,
          highlight_kwds={"fillOpacity": 1, "color": "red"},
      )
      out_str = self._fetch_map_string(m)
  
      assert '{"color":"red","fillOpacity":1}' in out_str
  
imports: import geopandas
  import numpy
  import pandas
  import pytest
  import shapely
  from packaging.version import Version
  from matplotlib import cm
  from matplotlib import colors
  from branca.colormap import StepColormap
label_desc: Use image node_id 33 for calling the TestExplore obj's underlying member method code with example usage: obj.test_highlight() without return types