成员的完整列表，这些成员属于 com.netease.nimlib.sdk.v2.chatroom.config.V2NIMChatroomMessageConfig,包括所有继承而来的类成员

isHighPriority()	com.netease.nimlib.sdk.v2.chatroom.config.V2NIMChatroomMessageConfig
isHistoryEnabled()	com.netease.nimlib.sdk.v2.chatroom.config.V2NIMChatroomMessageConfig
setHighPriority(Boolean highPriority)	com.netease.nimlib.sdk.v2.chatroom.config.V2NIMChatroomMessageConfig
setHistoryEnabled(boolean historyEnabled)	com.netease.nimlib.sdk.v2.chatroom.config.V2NIMChatroomMessageConfig
V2NIMChatroomMessageConfig()	com.netease.nimlib.sdk.v2.chatroom.config.V2NIMChatroomMessageConfig
V2NIMChatroomMessageConfig(Boolean historyEnabled)	com.netease.nimlib.sdk.v2.chatroom.config.V2NIMChatroomMessageConfig