+#' The private field .pred is a list where each cell contains the predicted variables for
+#' a period of time of H<=24 hours, from hour P+1 until P+H, where P+1 is taken right
+#' after the end of the period designated by \code{getIndexInData()}. In other terms,
+#' \code{forecast$getForecast(i)} return forecasts for \code{data$getSerie(i+1)}.
+#' Each cell .pred[[i]] is itself a list containing three slots, as described in the
+#' 'field' section.