Js5Channel
constructor(bootstrap: Bootstrap, scopeId: Int, gameId: Int, hostname: String, port: Int, buildMajor: Int, buildMinor: Int?, lastMasterIndexId: Int?, continuation: Continuation<Unit>, importer: CacheImporter, masterIndexFormat: MasterIndexFormat, maxInFlightRequests: Int, maxBuildAttempts: Int = 10, maxReconnectionAttempts: Int = 1)