summary method for an objects of class c("retlev", "lax").
# S3 method for retlev
summary(object, digits, ...)an object of class c("retlev", "lax"), a result of
a call to return_level.
An integer. Used for number formatting with
signif. If digits is not specified
(i.e. missing) then signif() will not be called
(i.e. no rounding will be performed).
Additional arguments. None are used in this function.
Returns a list containing the list element object$call
and a numeric matrix matrix containing the MLE and estimated
SE of the return level.
See the examples in return_level.