#' Some function
#' 
#' This function is great! But \code{oh dear, a missing brace...
#' 
#' And isn't that a multi-line example? We should probably use @examples...
#' 
#' @param x A parameter.
#'
#' @returns Invisible `NULL`.
#' 
#' @example
#' some_function(10)
#' some_function(11)
#' 
#' @export
some_function <- function(x) {
  x
}
