#' 定义数值型的超级类,不可实例化
#'
#' @slot value numeric. 默认值
#' @slot min numeric. 最大值
#' @slot max numeric. 最小值
#' @slot step numeric. 步长
#'
#' @return 返回值
#' @include shinyInputElement.R
#' @export
#'
#' @examples superNumeric();
setClass("superNumeric", slots = c(value = "numeric",
min='numeric',
max='numeric',
step='numeric'),
contains = 'shinyInputElement')
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