# class_prototype_methods.R
#' @name Prototype-methods
#'
#' @title
#' Prototype: various methods for objects of class Container
#'
#' @description
#' Some usual \R methods for objects of class [`Prototype`][Prototype-class].
#' @param x a [`Prototype`][Prototype-class] object.
#' @param ... further arguments passed to or from methods.
#'
#' @return
#' Return value depends on the function used.
#' * [format()] method returns a `character` of length 1.
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