code: def test_subplot():
      fig = plt.figure(figsize=(5, 5))
      ax = Subplot(fig, 111)
      fig.add_subplot(ax)
  
file_path: matplotlib/lib/mpl_toolkits/axisartist/tests/test_floating_axes.py
imports: import numpy
  import matplotlib.pyplot
  import matplotlib.projections
  import matplotlib.transforms
  from matplotlib.testing.decorators import image_comparison
  from mpl_toolkits.axisartist.axislines import Subplot
  from mpl_toolkits.axisartist.floating_axes import FloatingAxes, GridHelperCurveLinear
  from mpl_toolkits.axisartist.grid_finder import FixedLocator
  from mpl_toolkits.axisartist import angle_helper
label_desc: Use image node_id 1 for calling a global function with example usage: test_subplot() without return types