code: def annotate_axes(ax, text, fontsize=18):
      ax.text(
          0.5,
          0.5,
          text,
          transform=ax.transAxes,
          ha="center",
          va="center",
          fontsize=fontsize,
          color="darkgrey",
      )
  
imports: import matplotlib.pyplot
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: annotate_axes(ax, text, fontsize) without return types