#' @include ggplot-global.R
#' @include ggproto.R
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#' Base ggproto classes for ggplot2
#'
#' If you are creating a new geom, stat, position, or scale in another package,
#' you'll need to extend from `ggplot2::Geom`, `ggplot2::Stat`,
#' `ggplot2::Position`, or `ggplot2::Scale`.
#'
#' @seealso ggproto
#' @keywords internal
#' @name ggplot2-ggproto
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