code: def toggle_axisline(self, b=None):
      if b is None:
          b = not self._axisline_on
      if b:
          self._axisline_on = True
          for s in self.spines.values():
              s.set_visible(False)
          self.xaxis.set_visible(False)
          self.yaxis.set_visible(False)
      else:
          self._axisline_on = False
          for s in self.spines.values():
              s.set_visible(True)
          self.xaxis.set_visible(True)
          self.yaxis.set_visible(True)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import warnings
  import numpy
  from matplotlib import rcParams
  import matplotlib.artist
  import matplotlib.axes
  from matplotlib.path import Path
  from matplotlib.transforms import Bbox
  from .axisline_style import AxislineStyle
  from .axis_artist import AxisArtist, GridlinesCollection
label_desc: Use image node_id 2 for calling the Axes obj's underlying member method code with example usage: obj.toggle_axisline(b) without return types