code: def test_dodge(self):
      x = [0, 1]
      y = [1, 2]
      group = ["a", "b"]
  
      p = Plot(x=x, y=y, group=group).add(Dash(), Dodge()).plot()
      (lines,) = p._figure.axes[0].collections
  
      paths = lines.get_paths()
  
      v0 = paths[0].vertices.T
      assert_array_almost_equal(v0[0], [-0.4, 0])
      assert_array_equal(v0[1], [y[0], y[0]])
  
      v1 = paths[1].vertices.T
      assert_array_almost_equal(v1[0], [1, 1.4])
      assert_array_equal(v1[1], [y[1], y[1]])
  
imports: import numpy
  import matplotlib
  from matplotlib.colors import same_color, to_rgba
  from numpy.testing import assert_array_equal, assert_array_almost_equal
  from seaborn._core.plot import Plot
  from seaborn._core.moves import Dodge
  from seaborn._marks.line import Dash, Line, Path, Lines, Paths, Range
label_desc: Use image node_id 6 for calling the TestDash obj's underlying member method code with example usage: obj.test_dodge() without return types