code: def test_distribution_composite_custom_vdim(self):
      dist = Distribution(np.array([0, 1, 2]), vdims=["Test"])
      area = Compositor.collapse_element(dist, backend="matplotlib")
      assert isinstance(area, Area)
      assert area.vdims == [Dimension("Test")]
  
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 5 for calling the TestStatisticalCompositor obj's underlying member method code with example usage: obj.test_distribution_composite_custom_vdim() without return types