#' 设置泛型函数,用于提取类的FDate字段
#'
#' @param X
#'
#' @return 返回数值
#' @export
#' @include class_bill.R
#' @examples FDate(data);
setGeneric('FDate',signature = "X",function (X) {
standardGeneric('FDate')
});
#' 取用于对象于提供相应的数据
#'
#' @param bill 基类bill
#'
#' @return 返回相应的数据
#' @export
#' @include class_salesOrderHead.R
#' @examples FDate(data);
setMethod('FDate','salesOrderHead',function (X)
{
X@FDate;
})
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