waitDocumentMediaGroupContent

suspend fun BehaviourContext.waitDocumentMediaGroupContent(    initRequest: Request<*>? = null,     errorFactory: NullableRequestBuilder<*> = { null },     count: Int = 1,     includeMediaGroups: Boolean = true,     filter: SimpleFilter<CommonMessage<DocumentMediaGroupContent>>? = null,     mapper: CommonMessageToContentMapper<DocumentMediaGroupContent>? = null): List<DocumentMediaGroupContent>