set6: R6 Mathematical Sets Interface

#' @title Set of <%= toproper(operation)%>s
#' @description <%=(class)%> class for symbolic <%=(operation)%> of mathematical sets.
#'
#' @details
#' The purpose of this class is to provide a symbolic representation for the <%=operation%> of sets that
#' cannot be represented in a simpler class. Whilst this is not an abstract class, it is not recommended to construct
#' this class directly but via the set operation methods.
#'
#' @family wrappers
#' @seealso Set operations: [setunion], [setproduct], [setpower], [setcomplement], [setsymdiff],  [powerset], [setintersect]