DefaultBehaviourContext
constructor( bot: TelegramBot, scope: CoroutineScope, broadcastChannelsSize: Int = 100, onBufferOverflow: BufferOverflow = BufferOverflow.SUSPEND, upstreamUpdatesFlow: Flow<Update>? = null, triggersHolder: TriggersHolder = TriggersHolder(), subcontextInitialAction: CustomBehaviourContextAndTypeReceiver<BehaviourContext, Unit, Update> = {})