code: def test_constrained_layout16():
      """Test ax.set_position."""
      fig, ax = plt.subplots(layout="constrained")
      example_plot(ax, fontsize=12)
      ax2 = fig.add_axes([0.2, 0.2, 0.4, 0.4])
  
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 20 for calling a global function with example usage: test_constrained_layout16() without return types