成员的完整列表，这些成员属于 com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams,包括所有继承而来的类成员

getChannelId()	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
getRtcConfig()	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
getServerExtension()	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
getSignallingConfig()	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
isValid()	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
setRtcConfig(V2NIMSignallingRtcConfig rtcConfig)	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
setServerExtension(String serverExtension)	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
setSignallingConfig(V2NIMSignallingConfig signallingConfig)	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams
V2NIMSignallingJoinParams(String channelId)	com.netease.nimlib.sdk.v2.avsignalling.params.V2NIMSignallingJoinParams