##' Print and show methods
##'
##' @details
##' `print` displays the tree as a table, along with the coefficients of the fitted model and diagnostic information.
##' `show` provides a similar display.
##' @name print
##' @rdname print
##' @keywords internal
##' @aliases show
##' @family methods for ouch trees
##' @param object,x object to display.
##' @param ... additional arguments, ignored.
##' @return
##' `print` returns `x`, invisibly.
##' 
##' `show` returns `NULL`, invisibly.
NULL
