成员的完整列表，这些成员属于 NIMQChatSystemNotificationDataChannelCategoryWhiteBlackMembersUpdate,包括所有继承而来的类成员

accids	NIMQChatSystemNotificationDataChannelCategoryWhiteBlackMembersUpdate
accids_count	NIMQChatSystemNotificationDataChannelCategoryWhiteBlackMembersUpdate
category_id	NIMQChatSystemNotificationDataChannelCategoryWhiteBlackMembersUpdate
ope_type	NIMQChatSystemNotificationDataChannelCategoryWhiteBlackMembersUpdate
server_id	NIMQChatSystemNotificationDataChannelCategoryWhiteBlackMembersUpdate
type	NIMQChatSystemNotificationDataChannelCategoryWhiteBlackMembersUpdate