#' Opposite to %in% function
#'
#' @param x - vector with values that are not in y
#' @param y - vector to verify weather there are values from x in it
#'
#' @return vector with values that are in x and not in y
#' @export
#'
'%!in%' <- function(x,y){!('%in%'(x,y))}
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