+#' 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 until P+H-1, where P == predict_from.
+#' \code{forecast$getForecast(i)} output forecasts for
+#' \code{data$getSerie(forecast$getIndexInData(i))}.
+#'
+#' @usage # Forecast$new(dates)