+#' \item centered_serie: centered serie
+#' \item level: corresponding level
+#' \item exo: exogenous variables
+#' \item exo_hat: predicted exogenous variables (for next day)
+#' }
+#'
+#' @section Methods:
+#' \describe{
+#' \item{\code{getSize()}}{
+#' Number of series in dataset.}
+#' \item{\code{getStdHorizon()}}{
+#' Number of time steps from serie[1] until midnight}
+#' \item{\code{append(time, serie, exo, exo_hat)}}{
+#' Measured data for given vector of times + exogenous predictions from
+#' last midgnight.}
+#' \item{\code{getTime(index)}}{
+#' Times (vector) at specified index.}
+#' \item{\code{getCenteredSerie(index)}}{
+#' Centered serie at specified index.}
+#' \item{\code{getCenteredSeries(indices)}}{
+#' Centered series at specified indices (in columns).}
+#' \item{\code{getLevel(index)}}{
+#' Level at specified index.}
+#' \item{\code{getSerie(index)}}{
+#' Serie (centered+level) at specified index.}
+#' \item{\code{getSeries(indices)}}{
+#' Series at specified indices (in columns).}
+#' \item{\code{getExoHat(index)}}{
+#' Predicted exogenous variables at specified index.}
+#' \item{\code{getExo(index)}}{
+#' Measured exogenous variables at specified index.}
+#' \item{\code{removeFirst()}}{
+#' Remove first list element (if truncated).}
+#' \item{\code{removeLast()}}{
+#' Remove last list element (if truncated).}