code: def test_stackplot_smoke():
      # Small smoke test for stackplot (see #12405)
      plt.stackplot([1, 2, 3], [1, 2, 3])
  
imports: import difflib
  import numpy
  import sys
  from pathlib import Path
  import pytest
  import matplotlib
  from matplotlib.testing import subprocess_run_for_testing
  from matplotlib import pyplot
label_desc: Use image node_id 4 for calling a global function with example usage: test_stackplot_smoke() without return types