code: def test_shared():
      fig, axs = plt.subplots(2, sharex=True)
      fig = pickle.loads(pickle.dumps(fig))
      fig.axes[0].set_xlim(10, 20)
      assert fig.axes[1].get_xlim() == (10, 20)
  
imports: from io import BytesIO
  import ast
  import pickle
  import pickletools
  import numpy
  import pytest
  import matplotlib
  from matplotlib import cm
  from matplotlib.testing import subprocess_run_helper
  from matplotlib.testing.decorators import check_figures_equal
  from matplotlib.dates import rrulewrapper
  from matplotlib.lines import VertexSelector
  import matplotlib.pyplot
  import matplotlib.transforms
  import matplotlib.figure
  from mpl_toolkits.axes_grid1 import parasite_axes
label_desc: Use image node_id 13 for calling a global function with example usage: test_shared() without return types