code: def make_plots(self, filename: str = "stsp.png") -> None:
      plt.clf()
      # Plot the optimization run.
      ax = plt.subplot(1, 1, 1)
      ax.set_xlabel("iteration number")
      order = self.order
      x = self.x
      y = self.y
      ax.plot((x[o] for o in order), (y[o] for o in order))
      plt.savefig(filename)
  
file_path: nevergrad/nevergrad/functions/stsp/core.py
imports: import matplotlib.pyplot
  import numpy
  from nevergrad.parametrization import parameter
  from ..base import ExperimentFunction
label_desc: Use image node_id 3 for calling the STSP obj's underlying member method code with example usage: obj.make_plots(filename) without return types