ADMIN_USER
ADMIN_USER = 10
会员等级变更记录表 -> 变更类型 Class ChangeType
Create an enum by implementing this class and adding class constants.
equals(\MyCLabs\Enum\Enum  $enum = null) : boolean
                Compares one Enum with another.
This method is final, for more information read https://github.com/myclabs/php-enum/issues/4
| \MyCLabs\Enum\Enum | $enum | 
True if Enums are equal, false if not equal