成员的完整列表，这些成员属于 com.netease.nimlib.sdk.v2.passthrough.V2NIMPassthroughService,包括所有继承而来的类成员

addPassthroughListener(V2NIMPassthroughListener listener)	com.netease.nimlib.sdk.v2.passthrough.V2NIMPassthroughService
httpProxy(V2NIMProxyRequest request, V2NIMSuccessCallback< V2NIMProxyResponse > success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.passthrough.V2NIMPassthroughService
removePassthroughListener(V2NIMPassthroughListener listener)	com.netease.nimlib.sdk.v2.passthrough.V2NIMPassthroughService