parameters: (self, msg)
docstring: Called on a successful unsubscribe. No default implementation.
docstring_summary: Called on a successful unsubscribe. No default implementation.
docstring_tokens: Called on a successful unsubscribe . No default implementation .
function: def on_unsubscribe(self, msg):
          '''Called on a successful unsubscribe. No default implementation.'''
          pass
function_tokens: def on_unsubscribe ( self , msg ) : pass