human
Solve the following python programming problem given the following code:
def create_connection_closed_cb(connection) : 
    def connection_closed_cb() : 
        message = 'AMQP broker connection closed.
close-info: {0}'.format (connection.close_info) 
        logger.warning (message) 
return <MASK> 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: connection
assistant
#Here is a proper replacement for <MASK>.
def connection_closed_cb(