code: def test_constrained_layout2():
      """Test constrained_layout for 2x2 subplots"""
      fig, axs = plt.subplots(2, 2, layout="constrained")
      for ax in axs.flat:
          example_plot(ax, fontsize=24)
  
imports: import gc
  import numpy
  import pytest
  import matplotlib
  from matplotlib.testing.decorators import image_comparison
  import matplotlib.pyplot
  import matplotlib.transforms
  from matplotlib import gridspec, ticker
label_desc: Use image node_id 4 for calling a global function with example usage: test_constrained_layout2() without return types