<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def update_snapshot(self, snapshot, display_name=None, display_description=None):
 """ Update the specified values on the specified snapshot. You may specify one or more values to update. """

        return snapshot.update(display_name=display_name,
                display_description=display_description)