todo_w3css_filters.R

#' W3.CSS Filters
#'
#' Implementation of W3.CSS Filters, as described in
#' [https://www.w3schools.com/w3css/w3css_filters.asp](https://www.w3schools.com/w3css/w3css_filters.asp)
#'
#' @return
#' @export
#'
#' @examples
#'
#' TODO