GroupMemberRole

未定义角色（使用此枚举代表查询全部类型群成员）

普通群成员

管理员。

群主。

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants.