"retlev" objectsummary 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.
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.