#' S4Data package
#'
#' This package provides simple S4 classes \code{s4.data.frame}
#' , \code{s4.vector}, \code{s4.list} and \code{s4.data.frame} that are
#' equivalents to the analogous base R objects. Unlike the base objects, the S4
#' variants allow overloading and polymorphism of the standard R accessors: $,
#' [, [[. These classes are implemented as S4 classes that contain/inherit from
#' the base classes.
#'
#' In all cases, these are drop-in replacements for the base classes.
#'
#'
#' @doctype package
#' @name S4Data
NULL
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