Maintenance 维护

This class is designed to work with maintenances. 此类讲解了maintenances的使用

Object references: 对象引用：

• Maintenance

• Time period

Available methods: 可用的方法：

• maintenance.create - creating new maintenances

• maintenance.delete - deleting maintenances

• maintenance.get - retrieving maintenances

• maintenance.update - updating maintenances