code: def test_shared_axis_quantity(quantity_converter):
      munits.registry[Quantity] = quantity_converter
      x = Quantity(np.linspace(0, 1, 10), "hours")
      y1 = Quantity(np.linspace(1, 2, 10), "feet")
      y2 = Quantity(np.linspace(3, 4, 10), "feet")
      fig, (ax1, ax2) = plt.subplots(2, 1, sharex="all", sharey="all")
      ax1.plot(x, y1)
      ax2.plot(x, y2)
      assert ax1.xaxis.get_units() == ax2.xaxis.get_units() == "hours"
      assert ax2.yaxis.get_units() == ax2.yaxis.get_units() == "feet"
      ax1.xaxis.set_units("seconds")
      ax2.yaxis.set_units("inches")
      assert ax1.xaxis.get_units() == ax2.xaxis.get_units() == "seconds"
      assert ax1.yaxis.get_units() == ax2.yaxis.get_units() == "inches"
  
imports: from datetime import datetime, timezone, timedelta
  import platform
  from unittest.mock import MagicMock
  import matplotlib.pyplot
  from matplotlib.testing.decorators import check_figures_equal, image_comparison
  import matplotlib.units
  from matplotlib.category import UnitData
  import numpy
  import pytest
label_desc: Use image node_id 11 for calling a global function with example usage: test_shared_axis_quantity(quantity_converter) without return types