<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(self, obj_id, is_public=NotUpdated, is_protected=NotUpdated):
 """Update a Job Execution."""


        data = {}
        self._copy_if_updated(data, is_public=is_public,
                              is_protected=is_protected)
        return self._patch('/job-executions/%s' % obj_id, data)