code: def update_plan(self, updated_plan, project, id):
          
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'str')
          if id is not None:
              route_values['id'] = self._serialize.url('id', id, 'str')
          content = self._serialize.body(updated_plan, 'UpdatePlan')
          response = self._send(http_method='PUT',
                                location_id='0b42cb47-cd73-4810-ac90-19c9ba147453',
                                version='5.0',
                                route_values=route_values,
                                content=content)
          return self._deserialize('Plan', response)
docs: UpdatePlan.
          Update the information for the specified plan
          :param :class:`<UpdatePlan> <azure.devops.v5_0.work.models.UpdatePlan>` updated_plan: Plan definition to be updated
          :param str project: Project ID or project name
          :param str id: Identifier of the plan
          :rtype: :class:`<Plan> <azure.devops.v5_0.work.models.Plan>`