<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def expanded_callback(self, output, inputs=[], state=[], events=[]): # pylint: disable=dangerous-default-value
        '''
        Form an expanded callback.

        This function registers the callback function, and sets an internal flag that mandates that all
        callbacks are passed the enhanced arguments.
        '''
        self._expanded_callbacks = True
        return self.callback(output, inputs, state, events)