Nothing
      #_______________________________________________________________________________
#----                           occasions class                             ----
#_______________________________________________________________________________
#' 
#' Occasions class.
#' 
#' @export
setClass(
  "occasions",
  representation(
  ),
  contains="pmx_list",
  prototype = prototype(type="occasion")
)
#_______________________________________________________________________________
#----                            getNames                                   ----
#_______________________________________________________________________________
setMethod("getNames", signature=c("occasions"), definition=function(object) {
  return(object@list %>% purrr::map_chr(.f=~.x@colname))
})
#_______________________________________________________________________________
#----                                  show                                 ----
#_______________________________________________________________________________
setMethod("show", signature=c("occasions"), definition=function(object) {
  if (object %>% length() > 0) {
    cat("-> Treatment occasions:", paste0(object %>% getNames(), collapse=","))
	  cat("\n")
  }
})
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