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#' Get the environment
#'
#' @param x object to get environoment from
#'
#' @details
#' S3 returns the environment associated with an object.
#'
#' @return
#' Environment
#'
#' @export
env <- function(x) UseMethod('env')
#' @details
#'
#' For a formula object, `env` returns the environment in the `.Environment`
#' attribute.
#'
#' @examples
#'
#' env( lhs ~ rhs )
#'
#' @rdname env
#' @export
env.formula <- function(x)
attr( x, ".Environment")
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