class_docstr: Class that creates a callable object to retrieve events in a
  blocking way.
docstr: Disconnect all callbacks
docstr_tok: ["Disconnect","all","callbacks"]
code: def cleanup(self):
      """Disconnect all callbacks"""
      for cb in self.callbacks:
          self.fig.canvas.mpl_disconnect(cb)
  
      self.callbacks = []
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import matplotlib.lines
  import logging
label_desc: Use image node_id 4 for calling the BlockingInput obj's underlying member method code with example usage: obj.cleanup() without return types