code: def stack_plot(chart_2d):
      return chart_2d.stack([0, 1, 2], [[2, 1, 3], [1, 2, 0]])
  
imports: import itertools
  import platform
  import weakref
  import numpy
  import pytest
  from vtkmodules.vtkRenderingContext2D import vtkPen
  import pyvista
  from pyvista import examples
  from pyvista.plotting import charts
  from pyvista.plotting.colors import COLOR_SCHEMES
label_desc: Use image node_id 13 for calling a global function with example usage: stack_plot(chart_2d) and returns: chart_2d