code: def _on_disconnection_finished(self, success, result, failure_reason, context):
          
          if 'connection_handle' in context:
              # Remove all the notification callbacks registered for this connection
              with self.notification_callbacks_lock:
                  for connection_handle, attribute_handle in list(self.notification_callbacks.keys()):
                      if connection_handle == context['connection_handle']:
                          del self.notification_callbacks[(connection_handle, attribute_handle)]
  
          self.connections.finish_disconnection(
              context['connection_id'],
              success,
              failure_reason
          )
docs: Callback function called when a previously asked disconnection has been finished.
          It is executed in the baBLE working thread: should not be blocking.
  
          Args:
              success (bool): A bool indicating that the operation is successful or not
              result (dict): Disconnection information (if successful)
                - connection_handle (int): The connection handle that just disconnected
                - code (int): The reason code
                - reason (str): A message explaining the reason code in plain text
              failure_reason (any): An object indicating the reason why the operation is not successful (else None)
              context (dict): The connection context