wait
inline suspend fun <O : MessageContent> BehaviourContext.waitContent(initRequest: Request<*>? = null, includeMediaGroups: Boolean = true, noinline errorFactory: NullableRequestBuilder<*> = { null }): Flow<O>
suspend fun BehaviourContext.waitContent(initRequest: Request<*>? = null, errorFactory: NullableRequestBuilder<*> = { null }, includeMediaGroups: Boolean = true): Flow<MessageContent>