code: def example_pcolor(ax, fontsize=12):
      dx, dy = 0.6, 0.6
      y, x = np.mgrid[slice(-3, 3 + dy, dy), slice(-3, 3 + dx, dx)]
      z = (1 - x / 2.0 + x**5 + y**3) * np.exp(-(x**2) - y**2)
      pcm = ax.pcolormesh(
          x,
          y,
          z[:-1, :-1],
          cmap="RdBu_r",
          vmin=-1.0,
          vmax=1.0,
          rasterized=True,
      )
      ax.set_xlabel("x-label", fontsize=fontsize)
      ax.set_ylabel("y-label", fontsize=fontsize)
      ax.set_title("Title", fontsize=fontsize)
      return pcm
  
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 2 for calling a global function with example usage: example_pcolor(ax, fontsize) and returns: pcm