#' @include true.R
#' @include false.R
NULL
#' Negation operation
#'
#'
#'
#' @param x Filter object
#'
#' @name not_filter
NULL
#' @rdname not_filter
setMethod(`!`,
signature = "TrueFilterObject",
function(x) false()
)
#' @rdname not_filter
setMethod(`!`,
signature = "FalseFilterObject",
function(x) true()
)
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