waitNewChatMembersEvents

suspend fun BehaviourContext.waitNewChatMembersEvents(initRequest: Request<*>? = null, errorFactory: NullableRequestBuilder<*> = { null }, count: Int = 1, filter: SimpleFilter<ChatEventMessage<NewChatMembers>>? = null, mapper: EventMessageToEventMapper<NewChatMembers>? = null): List<NewChatMembers>