##' Generics for \code{extract} and \code{missingpreds} methods
##'
##' @aliases missingpreds
##'
##' @usage extract(object, ...)
##' missingpreds(object, ...)
##'
##' @param object The object on which the generic operates
##' @param \dots Arguments passed to specific methods
##'
##' @rdname generics
##'
##' @export
extract <- function (object, ...) {
UseMethod("extract", object)
}
##' @export
missingpreds <- function (object, ...) {
UseMethod("missingpreds", object)
}
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