#' Returns number of blocks of a chart.
#'
#' @param x [\code{scc_chart}]\cr
#' An object of type \code{scc_chart}.
#'
#' @return [\code{integer(1)}]
#' Number of blocks.
#' @export
getNumberOfBlocks = function(x) {
UseMethod("getNumberOfBlocks")
}
#' @export
getNumberOfBlocks.scc_chart = function(x, ...) {
length(x$blocks)
}
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