Convert a list object with ets koma_ts objects to a koma_ts multivariate time series (mets)
as_mets.RdConvert a list object with ets koma_ts objects to a koma_ts multivariate time series (mets)
as_mets.RdConvert a list object with ets koma_ts objects to a koma_ts multivariate time series (mets)