code: def test_bivariate_composite_transfer_opts_with_group(self):
      dist = Bivariate(np.random.rand(10, 2), group="Test").opts(
          cmap="Blues"
      )
      contours = Compositor.collapse_element(dist, backend="matplotlib")
      opts = Store.lookup_options(
          "matplotlib", contours, "style"
      ).kwargs
      assert opts.get("cmap", None) == "Blues"
  
imports: import numpy
  import pandas
  import pytest
  from holoviews.core.dimension import Dimension
  from holoviews.core.options import Compositor, Store
  from holoviews.element import Area, Bivariate, Contours, Curve, Distribution, Image, Points, Polygons
label_desc: Use image node_id 10 for calling the TestStatisticalCompositor obj's underlying member method code with example usage: obj.test_bivariate_composite_transfer_opts_with_group() without return types